Joint and Combined Variation Answers

Which equation(s) represent joint variations?

What is the constant of variation?k =

When x = 1 and y = –2, z = ⇒ -10.

What equation describes this variation?x = kyzy = kxz✔ z = kxyk = xyz

The variable varies directly with a and inversely with , and when = 2 and =5.The constant of variation is k = .

First, what is the equation of variation?y = ✔ kx/zkz/xkxz

What is the value of k?

The volume of a gas varies directly with temperature, T, and inversely with pressure, P. Which of the following equations represents that relationship?

Z varies directly with x and inversely with y. What happens to Z when both x and y are doubled?

When a = 1 and b = 5, what is the value of c?

What is the value of k?

What is the missing value of x? ⇒ 6

To the nearest liter, the volume is liters.

W varies jointly with x, y, and z. What happens to W when x, y, and z are each doubled?

What is the missing value of z?z =