Concept explainers
(a) To find:
The x-intercept rounded to nearest tenth.
Solution:
x-intercept is
Concept:
To find the
A point where a graph crosses the
It is in the form of (a, 0).
To find the y-intercept of a graph, we should substitute x
A point where a graph crosses the
It is in the form of (0, b).
Explanation:
Given equation is
Let y=0,
we get, x-intercept is
Conclusion:
x-intercept is
(b) To find:
The meaning of x-intercept rounded to nearest tenth.
Solution:
The number of analaog movie screens became zero after 5 years since 2009.
Concept:
To find the
A point where a graph crosses the
It is in the form of (a, 0).
To find the y-intercept of a graph, we should substitute x
A point where a graph crosses the
It is in the form of (0, b).
Explanation:
Given equation is
Where x is number of years and y is number of analog movie screens
Let y=0,
we get, x-intercept is
This means, The number of analaog movie screens became zero after 5 years since 2009.
Conclusion:
x-intercept is
c) To use:
Part (b) to comment on your opinion of the limitations of using equations to model real data.
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