What is a conditional statement for p: quadrilaterals q: squares

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Nine people are going to share a 128-ounces bottle of soda. how many ounces will each person get drink? choose the correct equation and answer for this situation