Concept explainers
a .
To interpret: the change in annual sales for a one-year increase in time.
a .
Answer to Problem 87E
Sales increasing 135 units/yr
Explanation of Solution
Given:
The slope of line representing the annual sales y in terms of time x in years is
The slope of line representing rate of change of the annual sales with respect to number of years is given to be
A positive slope is an indicator of increase in value.
So slope
b.
To interpret: the change in annual sales for a one-year increase in time.
b.
Answer to Problem 87E
No change in sales.
Explanation of Solution
Given:
The slope of line representing the annual sales y in terms of time x in years is
The slope of line representing rate of change of the annual sales with respect to number of years is given to be
A zero slope indicates that the line is a horizontal line; it implies the y -coordinate does not change no matter what the x -coordinate is.
So, here the zero slope indicates that the number of annual sales remains the same with respect to time in years.
c.
To interpret: the change in annual sales for a one-year increase in time.
c.
Answer to Problem 87E
Sales decreasing 40 units/yr
Explanation of Solution
Given:
The slope of line representing the annual sales y in terms of time x in years is
The slope of line representing rate of change of the annual sales with respect to number of years is given to be
A negative slope is an indicator of decrease in value.
So slope
Chapter 1 Solutions
EBK PRECALCULUS W/LIMITS
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