Question

MULTIPLE CHOICE QUESTION:

The table shows the amount of time different students studied for an exam and the scores they received. Draw a line that best represents the data, which equation in slope-intercept form best represents the line of best fit?

OPTION 1: y=1/3x +75

OPTION 2: y=3x + 67

OPTION 3: y=1/3x + 67
OPTION 4: y= 3x +75

Answer 1

Option 3: y = 1/3x +67

Explanation:

You want the equation of the best-fit line in slope-intercept form for the data given.

Best fit

The attached calculator display shows the best-fit line for the data, where x is in minutes, is approximately ...

y = 0.41x + 64

The closest answer choice is ...

Option 3: y = 1/3x +67

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Additional comment

The second attachment shows a plot of the data (study minutes, test score) with the best-fit line in red, and the Option 3 line in blue.

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