Question

The production rate of a steel factory is declining due to old machinery. Over the last eight days production has dropped by 1.2 tons. What is the average rate of change in steel production over the eight days? Express the answer in tons per day.

Answer 1

Find the unit rate:

-1.2 tons
------------- = -0.15 ton/day, or -3/20 ton/day
8 days

Answer 2

The average rate of change in steel production over the eight days is 0.15 tons per day

Explanation:

Over the last eight days production has dropped by 1.2 tons.

Production dropped in 8 days = - 1.2

Production dropped in 1 day =
`(-1.2)/(8)`

=
`-0.15`

So, the average rate of change in steel production over the eight days is 0.15 tons per day