Describe a function that has an inverse function that is well-defined. What process do you think you could go through to determine the original function if all you were given were the inverse function and a table of values for that function? For example, say you are given that f−1(x)=3x−1, and when x = -4, 1, 2, the original function has values of f(x) = -1, 0, 1 respectively. How would you find the rule for f(x)? If this specific question has already been answered, then try to come up with your own example and see if your peers can help solve it.

for the points! : )

you never say the total so we cant find the percentage used for petrol

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options a,b,c are the right answer.

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a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

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or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.

it has changed from the width and the height.

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