THU
The graph below displays the wrist circumferences and heights of six students in Alyssa's classroom.
.
Wrist Circumference Vs. Height
(16,165)
Height (cm)
(16,162)
• (15,6,159)
(152,156)
(13.8. 151)
150 +
(14 2,151)
1455
11 12 13 14 15 16 17 18
Wrist Circumference (cm)
Is the height of these students a function of their wrist circumference?

No because the wrist circumference of 16 cm is paired with two heights.

In the given graph we have  set of points representing the wrist circumferences and heights of six students in Alyssa’s classroom.
x axis  represents the wrist circumference while  y axis represent the height.
Any relation is called a function if for one value of x we have only one value of y. If the graph passes the vertical line test that is if a vertical line drawn touches the graph at only one point then the graph is called a function.In the given graph for x value x=16 there are two y values 162 and 165.So the graph is not a function.

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