Question

3.05]

Which of the following does not represent a function?

x 1 3 5 7
y 7 11 15 11


x −4 −2 0 2
y 3 −1 −5 −9


x −4 −3 −2 −1
y −32 −18 −8 −2


x −3 2 6 2
y 0 1 5 4

Answer 1

[3.03]

At an auto show, a car dealer asked the first 10 visitors their ages and the kinds of cars they own. The Venn diagram shows the details.

look at attachment

Based on the diagram, which of the following represents the ages of car owners in the set
(~P ∩ Q) ∪ (P ∩ R)?

a {32, 48, 64}

b {38, 42, 53}

c {32, 42, 53, 64}

d {32, 38, 42, 53, 64}

Answer 2

For your first question, a function is defined as a set of numbers, where each domain value (x-value) is paired with only one range value (y-value). In the first 3 answers, that is true, since no domain value is used twice. So the answer is D.