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4.03 Graphing linear functions

Worksheet
Gradients and y-intercepts
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 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
3

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
4

For each of the following linear equations:

i

Find the gradient of the line.

ii

State the coordinates of the y-intercept.

a

y = - x - 8

b

y = 1 + 10 x

c

y = - 2 x

d
y = - 1 - \dfrac{9 x}{2}
e
y = \dfrac{9 - 2 x}{4}
5

For each of the following equations:

i

Rewrite the equation in gradient-intercept form.

ii

State the gradient of the line.

iii

State the y-coordinate of the y-intercept of the line.

a

y = 6 \left( 3 x - 2\right)

b

3 x - y - 4 = 0

c

5 x - 30 y - 25 = 0

Graphs of lines
6

For each of the following linear equations:

i

Find the coordinates of the y-intercept.

ii

Find the gradient.

iii

Sketch the graph 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 = - 3 x - 4

g

y = \dfrac{x}{3} + 3

h

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

7

Sketch the graph of each linear equation using the gradient and y-intercept:

a

2y = 3x-8

b

6x-3y=9

c

2x+5y=0

8

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 .

9

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{5}{4}.

c

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

d

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

10

For each of the following linear equations:

i

Complete the table of values.

ii

State the coordinates of the axes intercepts.

iii

Sketch the graph of the line.

a

y = 2 x - 4

x0123
y
b

y = - 2 x + 4

x0123
y
c

y = \dfrac{5 x}{3} - 5

x0369
y
d

y = - \dfrac{1}{2}x + 6

x-60612
y
11

For the following equations:

i

Find the value of y at the y-intercept.

ii

Find the value of x at the x-intercept.

iii

Sketch the graph of the line.

a
y = - 4 x + 4
b

3 x + y + 2 = 0

c
- 6 x + 2 y - 12 = 0
d
10 x -3 y + 15 = 0
12

Consider the equation y = - 2 x.

a

Find the value of y at the y-intercept.

b

Find the value of x at the x-intercept.

c

Find the value of y when x = 2.

d

Sketch the graph of the line.

13

Consider the equation 2 x - y - 2 = 0.

a

Complete the table of values:

b

Sketch the graph of the line.

c

State the coordinates of the axes intercepts.

d

Find x when y = - 5.

x- 1014
y
Horizontal and vertical lines
14

Consider the given table for the linear equation x = 0 :

Does this represent the y-axis or x-axis?

x0000
y- 5.5- 2.53.56.5
15
a

Explain why the gradient of a vertical line is undefined.

b

Explain why the gradient of a horizontal line is zero.

16

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 = - 8

17

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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