Julie is selling candy bars to raise money for new band uniforms. candy bar x sells for $2 and candy bar y sells for $3. the number of y candy bars julia sells must be greater than or equal to three times the number of x candy bars she sells. she has at most 36 candy bars to sell. what is the maximum revenue she can make? $36 $99 $108 $216

In this question, you are asked how much the maximum revenue. Since candy Y sold for a higher price than candy X, that means you have to sell candy Y as much as possible.
The number of candy Y must be >= 3 times candy X. Since this won't limit candy Y selling, then you can convert all 36 candy into candy Y and 0 candy X

36 candy (Y) >= 0 candy(X) > the requirement is met.

The revenue would be 36 candy Y * $3/candy Y= $108

Is there a picture of a graph or whatever that goes along with this?