
Concept explainers
a.
The table that shows her hair length for each of the three months and for the next three months.
a.

Answer to Problem 46PPS
Time (months) | Length of hair (inches) |
0 | 8 |
3 | 9 |
6 | 10 |
9 | 11 |
Explanation of Solution
Given:
Her hair was 8 inches long and in three months it grew another inch at a steady rate.
Concept Used:
Equation of the line passing through the points
Calculation:
Given that initially her hair was 8 inches long and every three months the length of hair grows by 1 inch.
A table representing her hair length is shown below:
Time (months) | Length of hair (inches) |
0 | 8 |
3 | 9 |
6 | 10 |
9 | 11 |
b.
The graph showing the relationship between her hair length and time in months.
b.

Answer to Problem 46PPS
Explanation of Solution
Given:
Her hair was 8 inches long and in three months it grew another inch at a steady rate.
Concept Used:
Equation of the line passing through the points
Calculation:
The graph showing the relationship between her hair length and time in months is shown below. Here hair length is represented by the vertical axis and the time in months is represented by the horizontal axis.
c.
The average retail price for a 7-year old car.
c.

Answer to Problem 46PPS
Explanation of Solution
Given:
Her hair was 8 inches long and in three months it grew another inch at a steady rate.
Concept Used:
Equation of the line passing through the points
Calculation:
The slope of the graph can be computed using the points
Thus, the slope of the graph is
It implies that her hair growing at a rate of 1/3 inches per month.
Chapter 3 Solutions
Algebra 1
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