Question

The equation of the linear regression line represents the relationship between the number of years since 2000, x, and the average cost of tuition at a four-year college, y. What does the slope of the line represent? yˆ = 938x + 12,765
For every year since 2000, the cost of tuition increased by $12,765
For every year since 2000, the cost of tuition decreased by $938
For every year since 2000, the cost of tuition increased by $938
The cost of tuition in the year 2000 was $938

Answer 1

The regression equation is in the form y = mx+b where m = 938 is the slope

The slope of 938 means that each year the tuition is increasing by roughly $938.

The answer is choice C.