Answer:
The answers are in the image.
Step-by-step explanation:
Charlie made the mistake by not getting the equation equal to zero.

Subtract 16 to both sides making it equal to 0.

Using Quadratic Formula to Solve for x.
Answer:
interquartile range
Step-by-step explanation:
Answer:
not appropriate
Step-by-step explanation:
A linear model is not appropriate because the residual plot does not show a linear pattern.