Answer:
Slope is 2.
Step-by-step explanation:
Slope is 
1⅓πr³ = 36π
r³ = 36π/1⅓π
r³ = 27
r = ³√27
r = 3 feet
0 ≤ x < 3
sorry if this is wrong!
Yvette wants to earn a profit of $360, then. That means she has to make a total of $480. 480 divided by 18 is 26 and 2/3. That basically rounds up to $26.67.
480 = 18x
360 = 18x - 120
120(3) = 18x - 120
(I'm not that good at this, so don't take my word for it)