Question

The graph of a linear function passess through the points (3, 19) and (5, 23). Write an equation for the function. Show your work

Answer 1

y = 2x +13

Explanation:

1. find the slope by using the formula y2-y1

--------

x2-x1

which is

23 - 19 4

------------ = --- = 2

5-3 2

2. finding the y intercept

so to find the y intercept you plug in the numbers to this formula

y-y1 = m (x-x1)

y - 19 = 2 (x -3)

y - 19 = 2x -6

+19 +19

y = 2x +13