Question

What is the slope of a line that goes through the points (4,1) and (2,5)

Answer 1

`m = (y_2 - y_1)/(x_2 - x_1) = (5 - 1)/(2 - 4) = (4)/(-2) = -2`



`y - y_1 = m(x - x_1)`

`y - 1 = -2(x - 4)`

`y - 1 = -2x + 8`

`y = -2x + 9`