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4.03 Linear functions

Worksheet
Gradient from two points
1

For the following line segments AB:

i

State the rise from A to B.

ii

State the run from A to B.

iii

Hence find the gradient of line segment AB.

a
-4
-3
-2
-1
1
2
3
4
x
-4
-3
-2
-1
1
2
3
4
y
b
-4
-3
-2
-1
1
2
3
4
x
-3
-2
-1
1
2
3
4
5
y
2

Consider the straight line that passes through the points A, B, C and D.

a

Find the gradient of the line using the points A and D.

b

Find the gradient of the line using the points B and C.

c

Does it matter which two points on a line are used to find the gradient?

-6
-4
-2
2
4
6
x
-8
-6
-4
-2
2
4
6
8
10
12
14
y
3

Find the gradient of the following lines:

a
-4
-3
-2
-1
1
2
3
4
x
-4
-3
-2
-1
1
2
3
4
y
b
-6
-5
-4
-3
-2
-1
1
2
3
4
5
6
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
c
-5
-4
-3
-2
-1
1
2
3
4
5
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
d
-6
-5
-4
-3
-2
-1
1
2
3
4
5
6
x
-2
-1
1
2
3
4
y
4

Consider the following line, where A\left(4, 0\right) and B\left(1, 12\right) are both points on the line:

a

Find the gradient of the line.

b

As x increases, is the value of y increasing or decreasing?

-5
-4
-3
-2
-1
1
2
3
4
5
x
-16
-12
-8
-4
4
8
12
16
y
5

Find the gradient of the lines that pass through:

a

Point A \left( - 1 , 0\right) and Point B \left(0, 3\right)

b

Point A \left(2, - 6 \right) and the origin

c

Point A \left(3, 5\right) and Point B \left(1, 8\right)

d

Point A \left(-2, 4\right) and Point B \left(-5, -1\right)

6

For the following graphs:

i

State the coordinates of the y-intercept.

ii

Find the gradient of the line.

a
-8
-6
-4
-2
2
4
6
8
x
-8
-6
-4
-2
2
4
6
8
y
b
-8
-6
-4
-2
2
4
6
8
x
-8
-6
-4
-2
2
4
6
8
y
c
-8
-6
-4
-2
2
4
6
8
x
-8
-6
-4
-2
2
4
6
8
y
d
-8
-6
-4
-2
2
4
6
8
x
-8
-6
-4
-2
2
4
6
8
y
e
-8
-6
-4
-2
2
4
6
8
x
-8
-6
-4
-2
2
4
6
8
y
f
-8
-6
-4
-2
2
4
6
8
x
-8
-6
-4
-2
2
4
6
8
y
g
-8
-6
-4
-2
2
4
6
8
x
-8
-6
-4
-2
2
4
6
8
y
h
-8
-6
-4
-2
2
4
6
8
x
-8
-6
-4
-2
2
4
6
8
y
Gradient from a table of values
7

Consider the equation y = x and the table of values given below:

a

State the coordinates of the y-intercept.

b

As x increases, is the value of y increasing or decreasing?

c

Find the gradient of the line.

x- 3- 2-10
y- 3- 2-10
8

Consider the equation y = - x and the table of values given below:

a

State the coordinates of the y-intercept.

b

As x increases, is the value of y increasing or decreasing?

c

Find the gradient of the line.

x- 1012
y10-1- 2
9

Consider the equation y = 5 x and the table of values given below:

a

Find the coordinates of the y-intercept.

b

Find the gradient of the line.

x- 3- 2-10
y- 15- 10- 50
10

Consider the equation y = 2 x + 5:

a

Complete the given table of values:

b

State the coordinates of the y-intercept.

c

Find the gradient of the line.

x- 1012
y
11

Consider the table of values:

a

State the coordinates of the y-intercept.

b

Find the gradient of the line.

x- 2024
y1234
12

Consider the table of values:

a

State the coordinates of the y-intercept.

b

Find the gradient of the line.

x- 3036
y-1-2-3-4
Sketch graphs of lines
13

Sketch the graph of the following linear equations using the gradient and y-intercept:

a

y = x + 1

b

y = 4 x-1

c

y = 3 x - 1

d

y = - x + 4

e

y = -6x+2

f

y = \dfrac{1}{2} x - 2

g

2y = 3x-8

h

6x-3y=9

i

2x+5y=0

14

For each of the following, sketch the graph of the line:

a

Which passes through the point \left(0, -10\right) and has a gradient of 5.

b

Which passes through the point \left( - 2 , 4\right) and has a gradient of - 3 .

15

Sketch the graph of the following lines given the y-intercept and gradient:

a

A y-intercept of -2 and gradient of 5.

b

A y-intercept of -2 and gradient of \dfrac{1}{2}.

c

A y-intercept of 7 and gradient of - \dfrac{3}{4}.

d

A y-intercept of 2 and gradient of - \dfrac{5}{4}.

e

A y-intercept of 7 and gradient of - 1.

f

A y-intercept of - 3 and gradient of - \dfrac{2}{5}.

16

Sketch the graph of the linear function that has a gradient of - 1 and an x-intercept of 4.

Horizontal and vertical lines
17

Consider the graphed line below:

a

State the gradient of the line.

b

Does this line have a y-intercept?

c

State the x-intercept of the line.

d

Hence write the equation of the line.

-4
-3
-2
-1
1
2
3
4
x
-4
-3
-2
-1
1
2
3
4
y
18

Consider the graphed line below:

a

Complete the table of values for the line:

x-3 014
y
b

Hence state the equation of the line.

-4
-3
-2
-1
1
2
3
4
x
-4
-3
-2
-1
1
2
3
4
y
19

For the following graphs:

i

State the coordinates of the y-intercept.

ii

State the gradient of the line.

iii

Write the equation of the line.

a
-5
-4
-3
-2
-1
1
2
3
4
5
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
b
-5
-4
-3
-2
-1
1
2
3
4
5
x
-10
-8
-6
-4
-2
2
4
6
8
10
y
c
-5
-4
-3
-2
-1
1
2
3
4
5
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
d
-5
-4
-3
-2
-1
1
2
3
4
5
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
20

Consider the graphed line below:

a

Complete the table of values for the line:

x
y310-2
b

Hence state the equation of the line.

-4
-3
-2
-1
1
2
3
4
x
-4
-3
-2
-1
1
2
3
4
y
21

Sketch the graph of the following linear equations:

a

y = 4

b

x = 1

c

x = 0

d

y = 0

e

y = \dfrac{3}{2}

f

x = 4.5

g

y = - 3

h

x = - 6

i

x = - 8

22

State the equation of:

a

The x-axis.

b

The y-axis.

23

State the coordinates of the point of intersection of the following:

a

The line y = 5 and the line x = -2.

b

The horizontal line with y-intercept of 9 and the vertical line with x-intercept of -7.

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Outcomes

3.3.7

identify the rate of change of the dependent variable, relating it to the difference pattern in a table and the slope of an associated line drawn from practical contexts

3.3.8

determine and describe the significance of the vertical intercept in practical situations

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