given the following table, develop the polynomial expression that defines the data. show all steps. you may verify using regression but the answer must be obtained using algebra.
I guess one way to do it would be to plot the data, or create a mental image of the graph.
Then, as it appears to be a cubic, you can sub in co-ordinates into the general cubic equation, then solve the simultaneous equations to get the unknowns.
You could then test this equation using the other x and y values.