Janet is studying the relationship between the average number of minutes spent exercising per day and math test scores and has collected the data shown in the table. The line of best fit for the data is yˆ=0.46x+66.4. Minutes 15,20,25,30 Test Score 73,76,78, 80 (a) According to the line of best fit, the predicted test score for someone who spent 23 minutes exercising is 76.98. (b) Is it reasonable to use this line of best fit to make the above prediction? Select the correct answer below: 1.The estimate, a predicted test score of 76.98, is reliable and reasonable. 2. The estimate, a predicted test score of 76.98, is unreliable but reasonable. 3. The estimate, a predicted test score of 76.98, is unreliable and unreasonable. 4. The estimate, a predicted test score of 76.98, is reliable but unreasonable.
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
Janet is studying the relationship between the average number of minutes spent exercising per day and math test scores and has collected the data shown in the table. The line of best fit for the data is yˆ=0.46x+66.4.
(a) According to the line of best fit, the predicted test score for someone who spent 23 minutes exercising is 76.98.
(b) Is it reasonable to use this line of best fit to make the above prediction?
Select the correct answer below:
1.The estimate, a predicted test score of 76.98, is reliable and reasonable.
2. The estimate, a predicted test score of 76.98, is unreliable but reasonable.
3. The estimate, a predicted test score of 76.98, is unreliable and unreasonable.
4. The estimate, a predicted test score of 76.98, is reliable but unreasonable.
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