Usually the easiest way to solve this is by using a calculator. Of course only if your teacher allows you too.
Answer:
h= 2/3d
Step-by-step explanation:
slope is the change of y value on the change of x value
4/6 = 2/3
Add the probabilities
3/8+1/3=9/24+8/24=17/24
The total cost would be $191.49
Not rounded up so round it up to .50 if you have to :)