PC Magazine provided ratings for several characteristics of computer monitors, including an overall rating (PC Magazine website, April, 2015). The following data show the rating for contrast ratio, resolution, and the overall rating for ten monitors tested using a 0-100 point scale. The highest rated monitor was the benQ bL3201Ph, with an overall rating of 87.

a. Develop the estimated regression equation that can be used to predict the Overall Rating using the Contrast Ratio Rating.
b. Develop the estimated regression equation that can be used to predict the Overall Rating using both the Contrast Ratio Rating and the Resolution Rating.
c. Predict the overall Overall Rating for a computer monitor computer that has a Contrast Ratio Rating of 85 and a Resolution Rating of 74.

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Model Contrast Ratio 78 98 84 78 Resolution 89 87 82 Overall Rating 87 BenQ BL3201PH AOC U2868PQU NEC MultiSync PA322UHD Acer XB280HK Asus ROG Swift PG278Q AOC El 759Fwu Dell UltraSharp UZ2715H NEC MultiSync EA244UHD HP DreamColor Z27x Dell UltraSharp UZ2315H 85 82 82 82 81 79 82 78 57 75 81 70 47 76