as you already know, we start off by doing a quick switcheroo on the variables, and then we solve for y to get the inverse,

and if you run a vertical line test on that expression, you'll find that it doesn't pass it, meaning is not a function.
Answer:
9
Step-by-step explanation:
We can set up a systems of equations to find the value of the third side.
Let's assume that
is the length of both sides 1 and 2. Let's also assume that
is the length of the third side.
We know that
, and looking at the first clue we can make the equation
.
We can substitute y into the equation
.

So the length of the side that is the same as the second is 7.
Now we can plug this into the equation
to find
.

Hope this helped!
Answer:
5 ninths
Step-by-step explanation:
you make the thirds to ninths and then subtract
Answer:
$90
Step-by-step explanation:
Look at the number 7 on the bottom right of the graph. That means at the end of 7 weeks. Now look vertically up from there until you see a point directly above 7 weeks. Look to the left of that point, and you see that the point directly above 7 weeks is at the level of $90. That means that at the end of 7 weeks, he had $90.