prelim questions 050831

What are the coordinates of the three points you substituted into the form y = a t^2 + b t + c?

What are the three equations you obtained?

What are the two equations you obtained when you eliminated c?

List in order the functions you matched with the 8 graphs.  The functions are y = x, y = x^2, y = 2^x and y = sqrt(x).  You can just write down 'x', 'x^2', '2^x' or 'sqrt' to indicate these functions.

If you managed to solve the three equations for a, b and c, give your values of a, b and c.  This wasn't required so if you didn't get a solution yet that's OK.