Question

Data was collected on the amount of time that a random sample of 8 students spent studying for a test and the grades they earned on the test. a scatter plot and line of fit were created for the data. scatter plot titled students' data, with points plotted at 1 comma 60, 2 comma 60, 2 comma 70, 2 comma 80, 3 comma 80, 3 comma 90, 4 comma 95, and 4 comma 100, and a line of fit drawn passing through the points 0 comma 40 and 2 comma 70. determine the equation of the line of fit. a. y = 15x + 70 b. y = 15x + 40 c. y = 30x + 70 d. y = 30x + 40

Answer 1

y = 30x + 40

Explanation:

Answer 2

b. y = 15x + 40

Explanation:

You want the equation of the line of best fit through the given data.

Regression line

The graphing calculator in the attachment shows the line of best fit to be about y = 13x +45 (red).

The green line shown is what appears to be the nearest answer choice:

B. y = 15x +40

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