The zeros of a quadratic function are (-1, 0) and (3, 0). What is a possible
vertex of the function?

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation:

other answer is correct. i had used the radius of the radius somehow. a website: