Question

Identify the variation as direct, inverse, joint or combined.
s/t=c

Answer 1

A. A direct variation is of the form y = kx, where if x doubles, y doubles too. It can also be y/x = k.
B. An inverse variation is of the form y = k/x or xy = k. In this form when x doubles, y is cut in half.
C. A joint variation is when y varies directly with both x and z, such as y = kxz.
D. A combined variation has both direct and inverse variation, where some variables are in the numerator and others are in the denominator. This would be like y = kx/z.

Answer 2

Inverse:

\(y = \dfrac{k}{x}\)

Direct:

\(y = kx\)

Which do you think?

Answer 3

Inverse.

Answer 4

Yep