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The best t line is given by the equation where represents the height of the plant above ground level, and represents the number of days since it rst sprouted.
a. What is the slope of the best t line? What does the slope of the line mean in this situation? Is it reasonable?
b. What is the -intercept of the best t line? What does the -intercept of the line mean in this situation? Is it reasonable?
Solution
Sample responses:
a. 0.404. It means that each day the plant grows about 0.404 centimeters taller. This is fairly reasonable since a young plant should grow, and this number is reasonable for the amount a young plant grows.
b. . It means that on day zero, when the seed was planted, it was 5.18 centimeters below the surface of the ground. This is reasonable since seeds are planted below the surface, and about 5 centimeters seems the right amount.
Problem Statement
A taxi driver records the time required to complete various trips and the distance for each trip.
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Teacher Guide Algebra
