For both problems, we can use the section formula.
1) 
2) 
Answer: $15.75
Step-by-step explanation:
$78.75/5 hr=$15.75/hr
Answer:
D
Step-by-step explanation:
I just did this test and D was the right answer.
Answer:
4.0
observed time spent exerciseing: 4.5
predicted time:5.5
residual: 1
5.0
observed time spent exerciseing: 6.5
predicted time:5.0
residual: 1.5