My kid is having trouble with the problems (of which there is maybe one per test) with long strings of polynomials and scatterplots. Somehow they seem to repeatedly crop up as problematic. Any place to get some good online explanations or review?
OK, a shot in the dark here. My guess is that the scatterplot questions tend to ask about the “line of best fit” or about the regression coefficient? If so, then the problem is probably one of simply not knowing how to use that function on the calculator. Try here: http://studenthelp.cpm.org/m/TI-84/l/95288-ti-84-non-linear-regressions
I’m not sure about the long strings of polynomials-- could you be more specific?