The formula of a midpoint between two points:

We have:

Substitute:

Answer: 
Answer:The answer can be simplify by the following steps;
Step-by-step explanation:
Answer:
up 10
Step-by-step explanation:
The function would change from
C(x) = 0.3x + 40
to
C(x) = 0.3x + 50
The change is only to the y-intercept, so the graph of the function will move up 10.
11/3 = 3 2/3 as a mixed fraction or proprr fraction
Subtract x and mutiply v and add the answer