Question

A hot air balloon went from an elevation of 6,678 feet to an elevation of 3,438 feet in 48 minutes. What was its rate of descent?

Answer 1

The rate of descent is
`-67.5(feet)/(minute)`

Explanation:

we know that

The formula to calculate the rate or slope between two points is equal to

`m=(y2-y1)/(x2-x1)`

Let

x------> the time in minutes

y----> the elevation in feet

we have

`A(0,6,678)\ B(48,3,438)`

Substitute the values

`m=(3,438-6,678)/(48-0)`

`m=(-3,240)/(48)`

`m=-67.5(feet)/(minute)`