Question

A line passes through the points (4,15) and (9,20). Right in line your function rule in terms of x and y for this line

Answer 1

use formula y-y1=m(x-x1)

(4,15) = (x1,y1)
(9,20)=(x2,y2)

m is the slope which you don’t have but you can find by doing (y2-y1)/(x2-x1)
m=(20-15)/(9-4)
m=5/5
m=1

y-y1=m(x-x1)
y-15=1(x-4)
y-15=x-4 |+15 to both sides
y=x +11

Answer 2

15

Explanation: