Write function rule and find k.

1) z varies jointly with x and y, and

when x=2 and y=3, z=72

Question

Mathematics

Priscilla Murray

24 September, 23:46

Write function rule and find k.

1) z varies jointly with x and y, and

when x=2 and y=3, z=72

+1

Answers (1)

Know the Answer?

Evelin Flowers · Answer 1

z = 12xy

Step-by-step explanation:

Given z varies jointly with x and y then the equation relating them is

z = kxy ← k is the constant of variation

To find k use the condition when x = 2 and y = 3, z = 72, that is

72 = k * 2 * 3 = 6k (divide both sides by 6)

12 = k, then

z = 12xy ← equation of variation

Write function rule and find k.1) z varies jointly with x and y, andwhen x=2 and y=3, z=72

Write function rule and find k.

1) z varies jointly with x and y, and

when x=2 and y=3, z=72