2nd Semester Test

What is a function

• a specific kind of relationship where every input has exactly one output

• A set of two numbers

• ALL decimal numbers

Tags

CCSS.8.F.A.1

What is the domain?

• Fractions
• Integers
• The domain is the set of all x or input values. We may describe it as the collection of the first values in the ordered pair

• All real numbers

What is the range?

• ALL irregular numbers

• The range is the set of all y or output values. We may describe it as the collection of the second values in the ordered pairs.

• ALL Prime numbers

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Find the DOMAIN

• {-5, -2, 1, 4}

• {-1, 0, 2, 3}

• {1, -2, 4, -5}

• {0, -1, 2, 3}

Find the RANGE

• {-5, -2, 1, 4}

• {1, -2, 4, -5}

• {0, -1, 2, 3}

Which set of ordered pairs is a function?

• {(9,5), (10,5), (9,-5), (10,-5)}

• {(2, -2), (5, 9), (5, -7), (1, 4)}

• {(6,-5), (7, -3), (8, -1), (9, -1)}

Tags

CCSS.8.F.A.1

Is this a function?

• Yes, one output for each input

• No, look at the -3's

• It depends

• Not enough information

Tags

CCSS.8.F.A.1

• 5

• 7

• 4

• 10

Answer explanation

To find f(2), substitute x=2 into the function f(x)=2x+3. Therefore, f(2)=2(2)+3=4+3=7. Hence, the correct answer is 7.

Tags

CCSS.HSF.IF.A.2

Tags

CCSS.HSF.IF.A.2

Is this a function?

• Yes, one output for each input

• No, multiple y-values for an x-value

• It depends

• Not enough information