Question

Direct Variation f(1) varies directly with x, and f(x) = 70 when x = 10. What is the constant of variation, K? Enter your answer in the box. k=

Answer 1

Since the equation for direct variation is f(x)=k*x, We can deduce that when x=0 f(x) will be 0. We have now two points to calculate our K.

`k=(70-0)/(10-0)=(70)/(10)=7`

Therefore, k is equal to 7.