4. Proportional Relationships & Lines

4.01 Unit rate and slope

4.02 Proportional relationships in the coordinate plane

4.03 Compare proportional relationships

4.04 Identify slope and describe lines

4.05 Identify the y-intercept

4.06 Graph lines

4.07 Descriptions, tables, equations, and graphs

4.08 Problem solving with tables, equations and graphs

Topic Review: Proportional relationships and lines

United States of America

Grade 8

4.05 Identify the y-intercept

Adaptive

Worksheet

Interactive practice questions

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

Slope

A

$y$y-intercept

B

$x$x-intercept

C

Easy

< 1min

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

Easy

< 1min

The equations $y=x+5$y=x+5, $y=2x+5$y=2x+5, and $y=4x+5$y=4x+5 are shown on the coordinate plane below.

Easy

1min

Consider the equation $y=-2-\frac{8x}{3}$y=−2−8x3.

Easy

< 1min

Outcomes

8.EE.B.6

Use similar triangles to explain why the slope m is the same between any two distinct points on a non-vertical line in the coordinate plane; derive the equation y = mx for a line through the origin and the equation y = mx + b for a line intercepting the vertical axis at b.

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