GENMATH

Which of the following is a one-to-one function?

• books to authors

• true or false questions to answer

• student number to student

• learning module to student

A one-to-one function crosses a horizontal line how many times?

• 1

• 2

• 3

• 4

It is a rule that relates values from a set of values to a second set of values.

• Set

• Relation

• Function

• Subset

It is a special relationship where each input has a single output.

• set

• relation

• function

• subset

Which of the following relations are functions?

• f = {(2,3), (1,2), (4,7), (6,9)}

• g = {(2,9), (3,11), (5,13), (7,13)}

• h = {(5,9), (10,7), (11,12), (5,8)}

Evaluate f(x) = 5(x) + 2

if x = 5

• 17

• 22

• 27

• 32

Evaluate f(x) = -9x-15

if x = 5

• -51

• -60

• -69

• -78

Add f(x) = 14x +15 and g(x) = -5x-20

• 9x - 5

• 5x -9

• -5x +9

• 9x+5

subtract f(x) = -16x +25 from g(x) = 21x -5

• 5x + 20

• 37x-30

• -37x + 30

• -5x + 20

Multiply f(x) = 15x + 5 and g(x) = 3x - 5

• $45x^2\ -60x\ -\ 25$

• $45x^2+60x+25$

• $45x^2-60x\ +25$

• $-45x^2\ -60x\ +25$