The graph shows a proportional relationship. 105
84
63
42
21
0
7
14
21
28
35
What is the constant of proportionality?
Enter the correct answer in the box.
k= ,, i need help asap!!!

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1