Understanding Functions and Relations

Which of the following relations is a function?

• {(Mickey, mouse), (Bugs, Bunny), (Cosmo, Wanda)}

• {(notebook, pen), (paper, pen), (pen, paper), (pen, notebook)}

• {(January, 1), (February, 1), (March, 1), (January, 2), (February, 2)}

In how many point(s) does a vertical line intersect the graph of a function?

• at least one point

• at exactly one point

• more than one point

Relations can be presented on the following EXCEPT

• Graph

• Table

• Shape

The rule 5x + y = 3 represents a relation. What would be the value of y when x = -3?

• 18

• 12

• -12

Which of the following refers to the value of output in a function?

• Dependent variable

• independent variable

• constant variable

In a set of ordered pairs (𝑥, 𝑦), what do you call the set of the first coordinates?

• domain

• range

• x-axis

In a set of ordered pairs (𝑥, 𝑦), what do you call the set of the second coordinates?

• domain

• range

• y-axis

The teacher asked John to determine the range of the given set of ordered pairs {(1,1), (2,4), (3,4), (−2,1), (−4,5)}. His answer is{1, 1, 4, 4, 5}. Is he correct?

• Yes, since the numbers are increasing.

• No, because range is the set of first coordinates.

• No, because the elements should be written once.

What do you call the part of a conditional statement that follows “if” when written in if-then form?

• conclusion

• converse

• hypothesis

What do you call the part of a conditional statement that follows “then” when written in if-then form?

• conclusion

• converse

• hypothesis