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 for Abraham to get an A–?(

To represent the number of points needed for Abraham to get an A–, we can use the rational number $\boxed{\frac{1}{2}}$.

To represent the number of points needed for Abraham to get an A–, we can use the rational number 0.5.