Question

If y various directly with x, write an equation for the direct variations. The find each value.

1.) If y = -4 when x = 10, find y when x =5

2.) If y = 12 When x = -15, find y when x = 2

3.) Find x when y = 18, If y = 9 when x = 8

Show your work/explain

Answer 1

The equation is y=kx

U have to substitute the numbers and once u get the k
You have to substitute the other numbers to get your answer

Forexample- question 1

Y=kx
Substiute the numbers

-4=k(10)
-2/5=k

Substitute 5 for x

Y=kx
Y=-2/5(5)
Y=-2