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use the vertical-line test to determine whether the relation is a function. if not, identify two points a vertical line would pass through.
a function
b not a function; (−3, 0) and (3, 0)
c not a function; (3, 2) and (−3, −2)
d not a function; (2, −2) and (2, 2)

step-by-step explanation:

c. not a function; (3, 2) and (−3, −2)

is the answer

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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step-by-step explanation:

d. all of the above

step-by-step explanation: