Question

Write the function that models the relationship in the post below:

Answer 1

I do not have the answer to this specific question :I

Answer 2

Since y varies directly with x and inversely with z.

We can write the equation
\[y = k \frac{x}{z}\]
Now is just a mater of finding the value of k, the constant.

Substitute in the given values,
\[\frac{5}{2} = k \frac{5}{4}\]

k=2

Now when x= 7 and z=2,
\[y = 2 \frac{7}{2}\]
y=7