EDGE Math 8

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Result

Choose the correct answer to each question.

1.	What is the domain of the set ${(1, 5), (2, 6), (3, 7)} ?$

{5, 6}

{1, 2, 3}

{5, 6, 7}

{1, 2, 3, 5, 6, 7}

Answer: ${1, 2, 3}$

2.	What is the range of the set ${(1, 5), (2, 6), (3, 7)} ?$

{5, 6}

{1, 2, 3}

{5, 6, 7}

{1, 2, 3, 5, 6, 7}

Answer: ${5, 6, 7}$

3.	If $f (x) = x^{2} + 4,$ what is $f (- 1) ?$

3

4

5

6

Answer: 5

4.	Using the vertical line test, which of the following graphs is that of a function?

Answer:

5.	Which of the following functions is linear?

y = x^{2}

y = x^{3} + 1

y = 3 + x^{2}

2 x + 3 y = \sqrt{2}

Answer: $2 x + 3 y = \sqrt{2}$

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