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Urgent!!! What is the slope-intercept form of the equation of the line that passes through the points (2, 7) and (4, −1) ?

User Kakitori
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1 Answer

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Use the rise over run formula to find the slope:


(y2-y1)/(x2-x1)


(-1 - 7)/(4-2) = (-8)/(2) = -4

Find the y-intercept of the line by multiplying the slope by the distance between x = 0 and a point. We'll use (2,7) to find the y-intercept.

0 - 2 = -2

-2(-4) + 7 = 15

The new point on the line is (0,15). Since x = 0, 15 is your y-intercept.

Plug in your slope and y-intercept into the equation:


y = mx + b

Answer:


y = -4x + 15
User Charles Stevens
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