Slope-Intercept Formy = mx + b — the form you can graph without doing any working.8th GradeIn y = mx + b, m is the slope and b is they-intercept — the point where the line crossesthe y-axis.y = mx + by = 2x + 3slope 2, crosses at (0,3)Read both straight off.y = −x + 5slope −1, crosses at (0,5)A bare minus means a coefficient of −1.y = 4slope 0, crosses at (0,4)No x term, so a horizontal line.2y = 6x + 8y = 3x + 4Divide everything by 2 to get into the form first.THE COMMON MISTAKE✗ reading b from 2y = 6x + 8 as 8✓ b is 4The equation must be solved for y before the form can be read.To graph: mark b on the y-axis, then use rise-over-run to step to asecond point.Slope-Intercept Formwww.littleactivity.com

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Math · 8th Grade

Slope-Intercept Form

y = mx + b — the form you can graph without doing any working.

How to use it

Plot b first, then count the slope. Two points is enough for a line.

Free · print-ready PDF · US Letter and A4

Grade
8th Grade
Ages
13–14
Subject
Math
Pages
1

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