CPM Homework Help : CC3 Problem 9-60

Cisco was looking at a table of values from a silent board game of $y = x^{2}$ . She said, “This table contains $(0, 0)$ , so I think it shows a proportional relationship.” Is Cisco correct? Why or why not?

Hint:

Proportional relationships do contain the point $(0, 0)$ , but is she sure that the graph makes a straight line or that the table has points with corresponding ratios?

More Help:

Examine the graph of $x^{2}$ to the right.
Why is Cisco incorrect?

A parabola.