The second one because for every x value there is one and only one y value. If you plotted the points and graphed it, you would know it is not a function if it doesn't pass the vertical line test. Notice the same x values show up repeatedly in the other ordered pairs with different y values. Only one y value for every x value
Average speed = total distances / total time
3115.8 / 7.2 = 432.75 mi/h
When put into standard form, the equation turns out like this:
-2m^4-6m^2+4m+9
