Lao is following a weight gain program

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Lao is following a weight gain program. His weight is y and the number of months on the program is x.

Months, x	12	24	48
Weight in pounds	158	161	167

 

a. (4 pts) Use the points (12, 158) and (48, 167) to find a linear model that will predict Lao's weight. Please reduce any fractions in your answer.

 

b. (2 pts) Use your linear model to predict when Lao will reach 190 pounds. Round your answer to the nearest tenth of a month.