The answer is c, y=2. if you look at the graph you can see that where x=-2 the line intersects the y axis at +2.
R = 30 because r = 1,5,10,25
30/5+1=7
6+1=7
I can’t see the image it’s very blurry
To find the constants (k)
divide y by x:
11/7 = 1.57
13/8 = 1.625
15/9 = 1.66
17/10 = 1.7
Each answer is different, therefore y does not vary directly with x.