Question

Estimate the midpoint of the points. (6.1, 3.9) and (4.2, 8.1)

Answer 1

midpoint would be the middle of the numbers
or the average if you'd look at it that way

if the midpoint of x is the middle of 6.1 and 4.2
what is the midpoint?

if the midpoint of y is the middle of 3.9 and 8.1
what is the midpoint?

Answer 2

since you are asked to estimate, it might help to round those numbers to integers first

Answer 3

midpoint for 6.1 and 4.2 is 5.2
midpoint for 3.9 and 8.1 is 6