Question

Write an equation in point-slope form for the line with a slope of -9 that passes through (-1,-3)

Answer 1

`y+3=-9(x+1)`

Explanation:

The formula for point slope is:
`y-y1=m(x-x1)`

When:

m = slope

(x1,y1) = the point on the graph

-9 is the slope, so it replaces m. x1 is -1, and y1 is -3.

Plug in the values:

`y-(-3)=-9(x-(-1))` OR
`y+3=-9(x+1)`