X = 4 7 9 I dont mind for a step by step

Step-by-step explanation:

According to chord-chord theorem:

=>

=>

Dividing both sides by 2

=> x = 18/2

=> x = 9

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:

i would need to see the dot plot : )