Question

Find the equation of the line passing through the points (7, 20) and (-2, 11).​

Answer 1

y = x + 13

Explanation:

1. Use the coordinates to find the slope. (y2-y1)÷(x2-x1) = slope. Substitute values. (11-20)÷(-2-7)= (-9)÷(-9)=1

y=1x+b

2. Substitute coordinates to find b (y-intercept). Let's use (7,20). 20=7+b. b=13

3. Put it all together.

y=x+13