Topics
3. Relations & Functions
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United States of AmericaVirginia
Grade 8

3.06 Slope-intercept form

Lesson
Practice
Adaptive
Worksheet

Interactive practice questions

The graph of $y=x$y=x is shown in the applet. The slider creates a new function $y=x+b$y=x+b.

Choose the correct option to complete the statement:

If you add a negative number to $y=x$y=x, the line moves _______.

Down

A

Up

B
Easy
< 1min

What does $m$m represent in the equation of a line $y=mx+b$y=mx+b?

Easy
< 1min

What does $b$b represent in the equation of a line $y=mx+b$y=mx+b?

Easy
< 1min

Does the line $y=4x+7$y=4x+7 have the same slope as $y=-9x+7$y=−9x+7?

Easy
< 1min
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Outcomes

8.PFA.3

The student will represent and solve problems, including those in context, by using linear functions and analyzing their key characteristics (the value of the y-intercept (b) and the coordinates of the ordered pairs in graphs will be limited to integers).

8.PFA.3a

Determine how adding a constant (b) to the equation of a proportional relationship y = mx will translate the line on a graph.

8.PFA.3b

Describe key characteristics of linear functions including slope (m), y-intercept (b), and independent and dependent variables.

8.PFA.3c

Graph a linear function given a table, equation, or a situation in context.

8.PFA.3d

Create a table of values for a linear function given a graph, equation in the form of y = mx + b, or context.

8.PFA.3e

Write an equation of a linear function in the form y = mx + b, given a graph, table, or a situation in context.

8.PFA.3f

Create a context for a linear function given a graph, table, or equation in the form y = mx + b.

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