The regression analysis results for Gaodun Education are shown as y = 90x + 45. The standard error (S) is 30 and coefficient of determination (r ) is 0.81. The budget calls for production of 100 units. What is Gaodun Education’s estimate of total costs?
A. $3,090
B. $4,590
C. $9,030
D. $9,045
Answer:D
The estimate is determined by solving the equation, y = 90x + 45. Estimated cost is equal to $9,045 ($90 × 100 + $45).