Which explains why the graph is not a function? it is not a function because the points are not connected to each other. it is not a function because the points are not related by a single equation. it is not a function because there are two different x-values for a single y-value. it is not a function because there are two different y-values for a single x-value.

The correct option is 4.

Step-by-step explanation:

A relation is a function if and only if for each value of x, there exist a unique value of y.

It means if a relation contains and , where , then the relation is not a function.

We need to find a reason why the graph is not a function.

The reason is "it is not a function because there are two different y-values for the single x-value".

Therefore the correct option is 4.

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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