Question

A line passes through the points (-1, -1) and (3, 3) . Write a linear function in the form y = mx + b for this line.

Answer 1

y = x

Explanation:

computing the slope

m = ( 3 + 1 ) / ( 3 + 1 )

m = 1

choose one point ( 3 , 3 )

y - 3 = 1 ( x - 3 )

y - 3 = x - 3

y = x

m = 1, b = 0