Question

If the line oases though point 1,1 and 3,9 what is the y=mx+b

Answer 1

y = 4x - 3

Explanation:

slope = (y-y)/x-x)

slope = (9-1)/(3-1) = 8/2 = 4

y-y = m (x - x)

y - 1 = 4(x - 1)

y - 1 = 4x - 4

y = 4x -3