Which equation represents an inverse variation function that passes through the points (4, 5) and (10, 2)?

y =
y =
y = 20x
y =

An inverse variation function is of the form

where is constant.

Because the function passes through (4, 5). therefore

The required function is therefore


Verify that the function is correct because it should pass through the point (10, 2).
When x = 10, obtain

This verifies that the function is correct.