the right answer is the first graph. to know that, I just substituted 0 in x and I got -13 so that eliminated the second and third graphs. then I substituted -1 and that told me the rigth graph is the first one
the first graph. when x=2, y=-5 X^3 has a positive coefficient, (in this case, the coefficient is 1), so the larger is, the larger y is, the smaller x is, the smaller y is.
