In 2010 there were 2575 students at ECC.  In 2013 there were 3090 students.  For the units use student increase or student decrease, rounded to the nearest whole, and percent increase or percent decrease, rounded to the nearest 10th, in the answer boxes that ask for units.

What is the absolute change in the student population at ECC over this period?  What is the relative change in the student population at ECC over this period?

To find the absolute change in student population at ECC, you need to subtract the initial student population from the final student population.

So, you will subtract the number of students in 2010 (2575) from the number of students in 2013 (3090):

3090 - 2575 = 515.

Therefore, the absolute change in the student population at ECC over this period is 515 students.

To find the relative change (percent change) in the student population, you can use the formula:

((Final Value - Initial Value) / Initial Value) * 100

For this question, the initial value is the number of students in 2010 (2575) and the final value is the number of students in 2013 (3090).

((3090 - 2575) / 2575) * 100 = (515 / 2575) * 100 ≈ 20%.

Therefore, the relative change (percent change) in the student population at ECC over this period is approximately 20%.