The area of the triangle with vertices
is
.
Inserting numerical values, the are of the triangle with vertices (0, 0), (6, 2), (4, 8) is

Answer:
B.
Step-by-step explanation:
You can infer from the graph that, on average (which refers to mean), the scores in the post-test have increased in comparison to the scores on the pre-test.
132 + 146 + c should be greater than or equal to 325, and c should be greater than or equal to 47.