Abraham needs one-half of a point to get an A- in Math. What rational number can be used to represent the number of points needed Abraham to get an A-? (1 point)
The rational number that can be used to represent the number of points needed for Abraham to get an A- is $\boxed{\frac{1}{2}}$.
To represent the number of points needed for Abraham to get an A-, we need a rational number that is halfway between an A- and the grade just below it.
Assuming that the grading scale is from 0 to 100, let's use 90 as the cutoff for an A- grade.
To find the halfway point, we can take the average of 90 and the next lower grade, which is a B+ (or 87).
The average of 90 and 87 is:
(90 + 87) / 2 = 177 / 2 = 88.5.
Therefore, Abraham needs 88.5 points to get an A-.