Which of the following relations represents a function? Relation A (4, 12) (4,15) (5,18) (5,21) (6, 24) Relation B (4, 12) (5, 15) (6, 18) (7,21) (8, 24)

B

Step-by-step explanation:

because i done this before

Step-by-step explanation:

A. does not represent a function since x=4 produces y=15 and y=12 the table does not represent a function.

B. is a function.

The function rule is y=3x

h is the x-coordinate of the vertex

step-by-step explanation:

we have

in this function

the point represent the vertex of the function

so

h is the x-coordinate of the vertex

k is the y-coordinate of the vertex