Question

What is the point-slope form of a line with a slope -3 that contains the point (10,-1)

Answer 1

y + 1 = -3(x - 10)

Here's the formula:

y - y1 = m(x - x1)

Substitute numbers accordingly:

y1: so 1 goes in the y1 spot (you switch the signs because it was already negative)

x1:  and 10 goes to the x1 spot

m:  -3 belongs in m