Question

The value of y varies directly with x, and y=8 when x= -2. Find y when x=7.

Answer 1

as y varies directly with x thus we can write y in term of x as
y=kx here k is constant
=>k=y/x put y=8, x=-2
find k now

Answer 2

k would equal -4?

Answer 3

yes now you got the equation
y=-4x
now put x=7 in this equation to get y thats is

Answer 4

k=-4 and value of y=-28

Answer 5

thank you both so much!

Answer 6

welcome