FUNction Review

Which relation is a function?

• A
• C
• B
• D

Which relation is a function?

• (5, 3),(2, 8),(–5, –1),(4, 7),(2, 1)
• (7, 3),(2, 8), (–5, –1), (4, 7), (5, 7)
• (–5, 3),(2, 8),(–5, –1),(4, 7),(2, 2)
• (5, 3),(5, 8),(–5, –1),(4, 7),(–2, 1)

If f(x) = 8x + 9, then find f(5).

• 40
• 41
• 49
• 31

If g(x) = x² + 3x + 9, then find g(7).

• 37
• 373
• 79
• 61

For f(x) = 2x - 3, find f(-3)

• -3
• -9
• 3
• 11

For what value of x is the value of f(x) = 8x + 7 equal to -65?

• -9
• 2
• 3
• -3

Which word is another expression for domain?

• range
• output
• input
• dependent

The function w(x) = 5x represent the number of words w(x) you can type in x minutes. How many words can you type in 8 minutes.

• 58
• 40
• 400
• not given enough info

If given
c(d) = 3d - 5,
find c(7d).

• 31d
• 21d - 5
• 10d + 10
• 21d + 10

Given f(x) = -2x - 3 and the domain is {2, 3, 4}, find the range.

• 12, 18, 24
• -7, -9, -11
• 9, 15, 21
• 11, 17, 23