Question

I varies inversely with x and x=3.25 when y=4.5 what is the value of the x when y=3.75

A) 5.2
B)3.9
C)2.7
D)3.2

Answer 1

y varies inversly as x, so:

y = k/x, where k is the constant of proportionality, so:

4.5 = k/3.25, so

k = 4.5 x 3.25, so

k = 14.625, and

y = 14.625/x

when y = 3.75,

3.75 = 14.625/x, so

x = 14.625/3.75, so

x = 3.9

Answer:
B. 3.9