An inverse function is a function that reverses another function, so we have a function called:
Then, the inverse function will be as follows:
Given that
, we need to isolate x in terms of y:
∴
So:
and
therefore, exchanging variables x and y:
and
and
Which are the figures shown below.
The term input is referring to ‘x’ and the output is ‘y’.
To find the pattern you need to look at what x is to see the relationship to y.
An example is
(x,y)
0,2
1,3
2,4
3,5
4,6
5,7
When looking at the relationship in these numbers you can see that every time you add two to whatever x is to get y.
The equation for this line would be y=x+2
We know that
the screen aspect ratio=width/height-------> height=width/screen aspect ratio<span>
in this problem
</span>the screen aspect ratio=16/9
height=?
width=50 in
height=width/screen aspect ratio-----> 50/(16/9)---> 50*(9/16)---> 28.125 in
the answer is
28.1 in