SOLUTION: 1. Given: y varies directly with x. Write the variation equation. If y =3 when x = -6, find k, the constant of proportionality, and find y when x = 8. ( I really need help to

Question 95714This question is from textbook
: 1. Given: y varies directly with x. Write the variation equation. If y =3 when x = -6, find k, the constant of proportionality, and find y when x = 8.

( I really need help to find the formula to solve this equation and steps to show me how. Single mom with a 8 class load needs help!!!!!!!! This question is from textbook

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Given: y varies directly with x. Write the variation equation. If y =3 when x = -6, find k, the constant of proportionality, and find y when x = 8.
:
y = kx is the equation
:
Substitute 3 for y and -6 for x and find k
kx = y
-6k = 3
k = 3/-6
k = -
:
The equation: y = -x
:
Find y when x = 8
y = -*8
:
y = -4
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