a
To graph: Graph and find the quadratic model for the data.
a
Explanation of Solution
Given information:
Graph :
Interpretation : A quadratic model finds the equation of the parabola that best fits the set of data and its equation is given by
From the graph enter the value of x and y coordinates to find the value of a, b and c
And also the value of r-square to get the best fit value.
From the given formula below we calculate the respective value and get the required equation,
Therefore,
b
To calculate: calculate the time when the javelin hit the ground.
b
Answer to Problem 20E
Explanation of Solution
Given information:
Formula used: A quadratic model finds the equation of the parabola that best fits the set of data and its equation is given by
Calculation:
From above graph the respective values are
Therefore the equation of the quadratic model is given by,
Now to determine the time when the javelin hit the ground, we consider the value of y be zero and calculate for x.
But the negative value can not be considered , therefore the time when the javelin hit the ground is
Chapter 2 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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