8. Consider the following data for a dependent variable y and two independent variables, x₁ and x₂.

x1	x2	y
30	12	94
47	10	108
25	17	112
51	16	178
40	5	94
51	19	175
74	7	170
36	12	117
59	13	142
76	16	211

(a) Develop an estimated regression equation relating y to x₁. (Round your numerical values to one decimal place.)

= ______

Predict y if x₁ = 51. (Round your answer to one decimal place.)

______

(b) Develop an estimated regression equation relating y to x₂. (Round your numerical values to one decimal place.)

= ______

Predict y if x₂ = 16. (Round your answer to one decimal place.)

______

(c) Develop an estimated regression equation relating y to x₁ and x₂. (Round your numerical values to one decimal place.) =

Predict y if x₁ = 51 and x₂ = 16. (Round your answer to one decimal place.)

______

9. Ten observations were provided for a dependent variable y and two independent variables x₁ and x₂; for these data,

SST = 15,188.8 and SSR = 14,056.7.

(a) Compute R². (Round your answer to three decimal places.)

R² = ______

(b) Compute R_a². (Round your answer to three decimal places.)

R_a² = ______