Question

Cost varies directly as time. The cost is $8 when the time is 2 hours.

What is the constant of proportionality?



4
16
6

Answer 1

varies directly means\[\text{Cost } \alpha \text{ time} \rightarrow Cost=K(time)\] where k is a constant
\[8=K \times 2\]\[K=\frac{8}{2}=4\]

Answer 2

thanx u are a lot of help

Answer 3

ur welcome:D