PLEASE HELP Suppose y varies directly with x, and y=10 when x= -3. What direct variation equation relates x and y ? What is the value of y when x= -1?

Question

asked Apr 23, 2021 232k views

1 Answer

Leoh · Answer 1 · 2021-04-30T05:54:29+0000

Answer:

y =
(10)/(3)

Explanation:

Given y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 10 when x = - 3, thus

k =
(y)/(x) =
(10)/(-3) = -
(10)/(3)

y = -
(10)/(3) x ← equation of variation

When x = - 1, then

y = -
(10)/(3) × - 1 =