Question

What is the function rule for the graph shown?

Answer 1

^^

Answer 2

it`s a straight line , to figure out the equation
consider a general eq y = mx + c
then substitute the points and find out m and c

Answer 3

is it y = x +9

Answer 4

it should be x = y + 9

Answer 5

Yes! Though if you are using functions, you might want to write in function notation:

\[x=y+9\]
\[y=x-9\]
\[f(x)=x-9\]