The values of x and y vary directly and one pair of values are given. Write an equation that relates x and y. Simplify completely. x=-5,y=10 Please need help badly!!

Question

asked Jul 17, 2020 19.6k views

1 Answer

Ben Bates · Answer 1 · 2020-07-22T13:24:12+0000

Answer:

y = - 2x

Explanation:

Given that x and y vary directly then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition x = - 5, y = 10

k =
(y)/(x) =
(10)/(-5) = - 2

y = - 2x ← equation of variation