Question

Determine whether the relation shown in the table is a direct variation, an inverse variation, or neither. If it is a direct or inverse variation, write an equation for the function.

x : 10 15 20 25
y: 1/2 1/3 1/4 1/5

Explain

Answer 1

y = k / x
1 / 2 = k / 10
2 k = 10
k = 5
Also: 1/3 = 5/15, 1/4 = 5/20, 1/5 = 5/25.
Answer:
This is an inverse variation.
An equation is : y = 5 / x .