SOLUTION: y is directly proportional to R^2 When R=4, y=24 Work out the value of R when y=1350 My wrong working out: y ∝ r^2 24 ∝ 4^2

Algebra ->  Proportions  -> Lessons -> SOLUTION: y is directly proportional to R^2 When R=4, y=24 Work out the value of R when y=1350 My wrong working out: y ∝ r^2 24 ∝ 4^2      Log On


   

Question 980659: y is directly proportional to R^2
When R=4, y=24
Work out the value of R when y=1350
My wrong working out: y ∝ r^2
24 ∝ 4^2
1350\4^2 = 84.375
1350 ∝ √84.357
1350 ∝ 9.185586535
1350 ∝ 9
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
y is directly proportional to R^2

y=k%2AR%5E2, and you include k as a variation or proportionality constant.

system%28R=4%2Cy=24%29
Use these to find the value for k.