Algebra homework

Question

wri an equation in slope-intercept form of the line that passes through the points (2,15) and (5,21).

Answer 1

y = mx + b

We need to find m, the slope, then we can use either point to find b.

m = (21 - 15)/(5 - 2) = 6/3 = 2

I'll use the first point.

15 = 2(2) + b

15 = 4 + b

b = 11

y = 2x + 11