Concept explainers
and interpret the x - and y - intercepts of the given function.
Answer to Problem 28E
x -intercept=
The x -intercept in this case gives the time in which apple will hit the ground.
y -intercept=
The y -intercept in this case gives the initial height of the apple.
Explanation of Solution
Given:
The height in y (in feet) of an apple x seconds after falling from a tree given by the function:
Calculation:
The x -intercept of the given function is found by substituting
Now, here x represents time and time can never be negative, so solution is
Thus, the x -intercept of given function is
The x -intercept in this case gives the time in which apple will hit the ground.
The y -intercept of the given function is found by substituting
Thus, the y -intercept of given function is
The y -intercept in this case gives the initial height of the apple.
Chapter 8 Solutions
BIG IDEAS MATH Algebra 1: Common Core Student Edition 2015
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