Question 860175: I can't draw the graph on here, but I am looking at a graph of function f with the points at (1,6),(3,-1.5), (5,-3), (6,-7). What would a graph or the points of f^-1 look like? I am not sure at all where to start with this?
Answer by josgarithmetic(39620)   (Show Source):
You can put this solution on YOUR website! Plot the points! The curve could be lots of things. The arrangement seen on paper may suggest a cubic function, with negative leading coefficient, and maybe an inflection point between the x=3 and x=5 values.
With those ideas, start with  .
The four points will give you four equations, and the unknown, a, b, c, and d, are a count of four; so you will have a system of four equations to solve for a, b, c, and d.
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