Each year between and , the average increase in minimum wage was dollars.
Each year between and , the average increase in minimum wage was dollars.
Every years between and , the average increase in minimum wage was dollars.
Every years between and , the average increase in minimum wage was dollars.
Explanation
Correct answer: A.
Choice A is correct. The given equation is in slope-intercept form, or , where is the value of the slope of the line of best fit. Therefore, the slope of the line of best fit is . From the definition of slope, it follows that an increase of in the -value corresponds to an increase of in the -value. Therefore, the line of best fit predicts that for each year between and , the minimum wage will increase by dollar per hour.
Desmos solution:
Note: The slope of the line of best fit is 0.096, so each 1‑year increase in x predicts a 0.096‑dollar increase in minimum wage.
Enter in Desmos:
Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice B
Choice B is incorrect and may result from using the -coordinate of the -intercept as the average increase, instead of the slope.
Choice C
Choice C is incorrect and may result from using the -year increments given on the -axis to incorrectly interpret the slope of the line of best fit.
Choice D
Choice D is incorrect and may result from using the -coordinate of the -intercept as the average increase, instead of the slope, and from using the -year increments given on the -axis to incorrectly interpret the slope of the line of best fit.