Which is a proportional relationship
a. y= x+4 b. y= 0.3x

c. y=1/2 x +3 d. y=5x -1

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation:

hi there!

step-by-step explanation:

a roof pitch is basically for every inch rise there is 12 inches run.

the height of the roof is also known as the rafter.

formula: rafter^2 = rise^2 + run^2

rafter^2 = 5^2 + 12^2

rafter^2 = 25 + 144

rafter ^2 = 169"^2

the height of the roof from the lowest point to the highest point is 169"^2.

hope this : )