Long quiz math 8

1.      Which of the following statements is true?

• A.   Every relation is a function.

• B. Every function is a relation.

• C.  Not all functions are relations.

• D.   All functions are not relations.

2.      Which of the following is an example of a one-to-one relation?

• A.   {(1, 1), (1, -1), (2, 2), (2, -2), (3, 3), (3, -3)}

• B.   {(1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6), (1, 7)}

• C.   {(q, 3), (r,3), (s, 5), (t,4), (u, 4), (v, 4), (w,5), (x, 5)}

• D.   {(a, p), (b, q), (c, r), (d, s), (e, t), (f, u), (g, w), (h, x)}

3.      In a set of ordered pairs (𝑥_𝑖 , 𝑦_𝑖 ), what do you call the set of the first coordinates?

• domain

• range

• x-axis

• y-axis

4.      What is the domain of the set of ordered pairs {(1,2), (2,4), (3,6), (4,8)}?

• A.   {1, 2, 3, 4}

• B.   {2, 4, 6, 8}

• C. {1, 2, 6, 8}

• D.   {1, 2, 3, 4, 6, 8}

5.      Which of the following points describes the 𝑥-intercept 𝑎?

• (0, 0)

• (0,a)

• (a,0)

• (a,b)

6.      Which of the following functions is linear?

• 
• 𝑓(𝑥) = 2𝑥² + 1

• 𝑓(𝑥) = 3𝑥 − 2

• 𝑓(𝑥) = 3^𝑥 + 4

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

• hypothesis

• conclusion

• converse

• negation

8      “If John does his chores, then he will get a big scoop of strawberry ice cream. Which of the following represents the hypothesis in the above conditional statement?

• John does his chores.

• If John does his chores.

• He will get a big scoop of strawberry ice cream.

• Then he will get a big scoop of strawberry ice cream.

   

9.      Given “If p, then q”, which of the following describes a converse statement?

• If p, then q.

• If q, then p.

• If not p, then not q.

• If not q, then not p.

10.      Which of the following pairs of statements are equivalent?

• Conditional and contrapositive

• Conditional and converse

• Conditional and inverse

• Converse and contrapositive