Question

If y varies directly with x and y = -7 when x = -1, find x when y = -84.
a. 84
b. 7
c. -12

Answer 1

let y=k*x where k is some constant

the, -7 = k*(-1) substituting in above equation.

=> k = 7

there fore the equation y=k*x becomes y=7x
put y =-84
=> -84 = 7*x
=>x=-12

Answer 2

Oh okay, thank you!!

Answer 3

:)