It is 420% is the percent for 4 1/5
For 80 guests you will need 80/10 = 8 times more than for 10 guests:
8*9.50 = $76
Refreshment for 80 guests costs $76.
Answer:
b
Step-by-step explanation:
just took it i got 100%
The point-slope form:

- slope
- point
We have the point
and the slope 
Substitute:
