<h3>
Answer: Choice D</h3>

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Work Shown:

The idea is to swap each x and y, then solve for y to find the inverse.
A+b is less than or equal to 50
Problems a through c are asking you what the values would be at those values.
What will the value of
be at
? Let's look at the graph.
It seems at
,
, meaning that 
Let's do the same for the others.
At
, 
At
, 
For the last question, it is giving us the
value and asking us which
values would give us that.
At
,
.
*Note* this function is continuous to the right, meaning that there is another point where
.
Hope this helps.
頑張って!
Answer:Idk
Step-by-step explanation:
The answer is 800 square feet. Hope this was helpful!