Question

Find an equation of variation in which y varies jointly as x and z, and y= 48 when x = 8 and z=6

Answer 1

• y = xz

Explanation:

Joint variation equation:

• y = kxz, where k- coefficient of variation

Given

• y = 48,
• x = 8,
• z = 6

Find the value of k by plugging in the given values:

• 48 = 8*6k
• 48 = 48k
• k = 1

The equation is:

• y = xz