The following data represent the chemistry grades for a random sample of 12 freshmen at a certain college along with their scores on an intelligence test administered while they were still seniors in high school. the number of class periods missed is also given.

(a) Fit a multiple linear regression equation of the form yÌ‚ = b₀ + b₁x₁ + b₂x₂.
(b) Estimate the chemistry grade for a student who has an intelligence test score of 60 and missed 4 classes.

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Chemistry Test Classes Student Grade, y Score, x1 Missed, 2 85 65 2 74 76 3 55 5 4 90 65 2 85 55 6 87 70 3 94 65 98 70 5 9. 81 55 10 91 70 3 11 76 12 74 55