Question

Assume that y varies inversely with x. If y = -3 when x = 2.4, what is y when x = 2?
-3.6
-0.8
-7.2
4.8

Answer 1

y=k/x
-3=k/2.4
k=-7.2
y=-7.2/x
y=-7.2/2
y=-3.6

Answer 2

If y varies inversely with x, then y is proportional to 1/x. This is the same thing as saying the y equal 1/x times some constant. So you have

y = k/x

Answer 3

y=-3 when x=-2.4 so k=-7.2

Answer 4

then find y when x=2

Answer 5

x=2.4* sorry i made a typo