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

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(39617) (Show Source): You can put this solution on YOUR website!
y is directly proportional to R^2

, and you include k as a variation or proportionality constant.

Use these to find the value for k.
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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 &#8733; r^2 24 &#8733; 4^2

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