Answer:
the slope is 
Step-by-step explanation:
Notice that you are given two points to use for the slope calculation:

So we use the formula for the slope of a line given two points:

Answer:
Step-by-step explanation:
cost price x .60 = 80
80/.60 = 133.33 was the cost price
The answer is A because it earns interest
F(-1)=2 and f(0)=3 are the answers that are not true