Algebra 1 Midterm

True or false: every function is a relation.

• True
• False

Tags

CCSS.8.F.A.1

Does this mapping diagram represents a function?

• yes

• no

Tags

CCSS.8.F.A.1

What is the domain of the graph?

• Only positive numbers
• Only negative numbers
• Integers only
• All real numbers

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.B.5

Josh throws a ball from the top edge of a canyon and then watches it fall until it hits the canyon floor. Use the graph to tell how high above the canyon floor is the top edge of the canyon.

• 100 feet
• 200 feet
• 250 feet
• 150 feet

Use the function rule f(x) = −x + 2 and list the ordered pairs for the domain {−1, 0, 2}.

• {[-1, -1], [0, -2], [2, 4]}

• {[-1, 3], [0, 2], [2, 0]}

• {[-1, 1], [0, -2], [2, -4]}

• {[-1, -1], [0, 2], [2, -4]}

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

When is a sequence of numbers considered an arithmetic sequence?

• An arithmetic sequence has a variable difference between consecutive terms.
• An arithmetic sequence is defined by a geometric ratio between terms.
• An arithmetic sequence has a constant difference between consecutive terms.
• An arithmetic sequence must have at least three terms to be valid.

Tags

CCSS.HSF.BF.A.2

Find the recursive formula for the sequence −17, −9, −1, 7, 15, . . . .

• a(n) = a(n-1) + 8, a(1) = -17
• a(n) = a(n-1) - 8, a(1) = -17
• a(n) = a(n-1) + 10, a(1) = -17
• a(n) = a(n-1) + 6, a(1) = -17

Tags

CCSS.HSF.BF.A.2

Which of the following graphs represents a direct variation?

• C
• D
• A
• B

If y is directly proportional to x and y = 12 when x = 10, then: state the constant of variation.

• 1.5
• 1.2
• 0.8
• 2.0

If y varies inversely with x and y = 12 when x = 4, then: find y when x is 6.

• 6
• 12
• 10
• 8