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Answer :
Final answer:
By substituting x with 200 in the quadratic regression equation y = 0.008x² + 0.518x + 131.886, we find the y-value to be approximately 555.5.
Explanation:
To predict the y-value for an x-value of 200 using the quadratic regression equation y = 0.008x² + 0.518x + 131.886, we simply substitute x with 200.
The calculation is as follows:
y = 0.008(200)² + 0.518(200) + 131.886
= 0.008(40,000) + 103.6 + 131.886
= 320 + 103.6 + 131.886
= 555.486
Rounding to one decimal place, we get:
y ≈ 555.5
Thus, the predicted y-value when x is 200 is approximately 555.5.
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