The value of r is directly proportional to the value of t. If r=13 when t=94.25, what is the value of r when t=29?

Answer 1

r=kt

13=k94.25

k=13/94.25

k=1/(7.25)

k=100/725

k=4/29

r=(4/29)(29)

r=4

Answer 2

The value of r is directly proportional to the value of t means:

r = kt

where k is a constant. Solving for k:

r/t = k

So the ratio of r/t is the same for all values of r and t. Using the values for r and t given in the problem:

13 / 94.25 = r / 29

Solve for r.