Concept explainers
(a)
To find:The equation of the line for the given condition in slope intercept form.
(a)
Answer to Problem 9PT
The equation of the straight line is
Explanation of Solution
Given:
The equation passes through points
Calculation:
The standard form of line passing through two points is
Here
Substitute
The equation of the straight line is
Therefore, the equation of the straight line is
(b)
To predict:The amount of time required to paint a room of size 750 square feet.
(b)
Answer to Problem 9PT
The amount of time required to paint a room of size 750 square feetis
Explanation of Solution
Given:
The equation passes through points
Calculation:
The standard form of line passing through two points is
Here
Substitute
The equation of the straight line is
The equation of the straight line is
Calculate the time required for the room of size 750 square feet. Substitute 750 for x and calculate the time in minutes given by y .
Therefore, the time required is
Chapter 4 Solutions
Algebra 1
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