Q. Determine the value of y, if x is 4.y=x2−1Answer:
Substitute x into function: Substitute the given value of x into the function.We have the function y=x2−1 and we need to find the value of y when x is 4.Substitute x=4 into the function.y=(4)2−1
Calculate y: Calculate the value of y.Now we perform the calculation.y = 42−1y = 16−1y = 15
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