A line has a slope of 9 and passes through the point (1, 2) . What is its equation in slope -intercept form?

Answer 1

Use the following formula (point-slope) to solve this problem: y - y1 = m(x - x1), where m is the slope and x1, y1 are the given points. So now lets plug in what we know.

1. y - 2 = 9 (x - 1)

Distribute the right side of the equation

1. y - 2 = 9x - 9

Slope Intercept form is y = mx + b so we need to keep y by itself and move everything else over.

1. y = 9x - 9 - 2

Combine and your slope intercept form of the given information is

1. y = 9x -11

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