Question

How do you find the equation of a line given 2 of its points? The points I have are(-3, -6) and (-6, -15)

Answer 1

one way of several:
y = m x + b
slope m = difference in y / difference in x
m = (-15+6)/ (-6 + 3)
= -9/-3
= 3
so
y= 3 x + b
put a point in now to get b
-6 = 3 (-3) + b
b = 3
so
y = 3 x + 3

Answer 2

Thanks!

Answer 3

the slope is 3, so use the point-slope form of the line.
y+6 = 3(x+3)