Question

What is the equation of the line that passes through (1, 3) and (-2, -3)?

Answer 1

First, let's find the slope. Slope = rise / run (or I always remember it that way), so the difference in Y over the difference in X.

(3-(-3)) / (1-(-2)) = 6/3 = 2.

Now, we know y = 2x + b but need to find b. Thankfully, we have a point.

3 = 2(1) + b
b = 1

y = 2x + 1

Answer 2

thanks !