ACT Preparation / Unit 9 ACT 0810 short lesson, about 20 seconds
Slope-Intercept Form
Captions available
The idea
In slope-intercept form, y = mx + b, m is the slope and b the y-intercept, the value of y at x = 0.
In practice
y = −3x + 5 crosses the y-axis at 5 and falls 3 for each step right.
Where people slip
Solve for y first: 4x + 2y = 6 becomes y = −2x + 3, slope −2.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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