Question

Find the value of y for a given value of x, if y varies directly with x.
If y = 39 when x = –117, what is y when x = –132?

Answer 1

-3y=x
-3y=132
y=-44

Answer 2

y=39
x=-117
y when x=-132

39/-117=k
k=-0.3

y=-0.3*-132
y=39.6

thats what i got,

Answer 3

but k don't equal -0.3.

Answer 4

it equals -1/3

Answer 5

oh i still not getttin -44 tho

Answer 6

39/-117=k
k=1/3
y=1/3*-132
y=-44

Answer 7

put this in a calculator (1/3) x -132 = and you will get -44