Question

P varies directly as I. If P is 0.5 when I is 4, find P when I is 6

Answer 1

P = 0.75

Explanation:

Given that P varies directly as I then the equation relating thenm is

P = kI ← k is the constant of variation

To find k use the condition P = 0.5 when I = 4, thus

k =
`(P)/(I)` =
`(0.5)/(4)` = 0.125

P = 0.125I ← equation of variation

When I = 6, then

P = 0.125 × 6 = 0.75