Question

What is the function rule for the graph shown?
(see reply bar for graph and multiple choice)

Answer 1

A. y = 9x

B.y = x + 9

C. y = x – 9

D. \[y=\frac{ 1 }{ 9 } x\]

Answer 2

That is a line. Its equation in the format of y = mx + n
as you se
1) when x = 9 y= 0
so 0=m*9+n --> n = -9m
2) when x=11 y = 2
so 2 = m*11 + n
put n = -9m --> 2 = 11m -9m --> 2 = 2m --> m = 1

Put m in equation 1 or 2. I'll put in 2.
2) --> 2 = 1*11 + n --> n = -9

so y = mx + n = 1x -9 = x-9 ---> y= x-9

Answer 3

thank you!