Concept explainers
Average Speed
On a trip of d miles to another city, a truck driver's average speed was x miles per hour. On the return trip, the average speed was y miles per hour. The average speed for the round trip was 50 miles per hour.
(a) Verify that
What is the domain?
(b) Complete the table.
x | 30 | 40 | 50 | 60 |
y |
Are the values of y different than you expected? Explain.
(c) Find the limit of y as x approaches 25 from the right and interpret its meaning.
1
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