The number of cavities in school-aged children and size of vocabulary are known to have a strong negative association. Toby concluded that the number of cavities causes a decrease in vocabulary. Is Toby's conclusion valid? Explain.

c = 25

Step-by-step explanation:

A (-6, 5), B (-2, 4), C (-2, 5)

Form a triangle by adding a new point to the graph.

*in this case it is coordinate C

From A to C there are 4 units.

From B to C there are 9 units

Next you need to use the pythagorean theorem to find the length of A to B

Now use the lengths you have to find the missing length.