22.4k views
1 vote
Y varies jointly as x and z. If y = -40 when x = -2 and z = -1, what is the variation equation?

1 Answer

2 votes

Answer:

-20

Explanation:

if y varies jointly as x and z, then y = k * x * z

where k is the variation constant.

-40 = k * -2 * -1

-40 =2k

k = -20

User Tammen
by
3.2k points