Question

1. find the weighted average.

weighted average:________________________

Explanation:

Step1: Multiply points by weights

$$-8\times\frac{1}{4}=-2$$
$$-3\times\frac{1}{4}=-\frac{3}{4}$$
$$15\times\frac{1}{2}=\frac{15}{2}$$

Step2: Sum the products

$$-2-\frac{3}{4}+\frac{15}{2}=\frac{-8 - 3+30}{4}=\frac{19}{4} = 4.75$$

Answer:

\(4.75\)