Question 1

In the function $y = f(x)$, $x$ is the independent variable and $y$ is            the   dependent variable.

Accepted Answer

True

Answer

False

Question 2

A relation is a function if for every element in the domain there  correspond a unique element in the range.

Accepted Answer

True

Answer

False

Question 3

Vertical line intersects the graph of the function in at most one point.

Accepted Answer

False

Answer

True

Question 4

The relation$ { (1,4),(2,8),(3,5),(6,0) }$ is a function.

Accepted Answer

True

Answer

False

Question 5

The expression $f(x)$ does not mean “$f$ times $x$”.

Accepted Answer

True

Answer

False

Question 6

A relation associates five foods to the food groups to which they belong: 
      { (orange, fruit), (cheese, dairy) (broccoli, vegetable) (milk, dairy) (kiwi, fruit) } 
       Which statement is true?

Accepted Answer

Orange is an element in the domain.

Answer

Vegetable is an element in the domain.

Answer

This relation is not a function.

Answer

Kiwi is an element in the range.

Question 7

The equation M = 4.4n, relates the number of quarters, n, to its mass          
       M in grams.  What is the independent variable?

Accepted Answer

The number of quarters.

Answer

Each quarter weighs 4.4 grams.

Answer

The value of the quarters.

Answer

The mass of the quarters.

Question 8

The height of a plane is a function of the time since take off.  Identify the dependent variable?

Accepted Answer

height

Answer

speed

Answer

time

Answer

acceleration

Question 9

Which set of ordered pairs represents a function?

Accepted Answer

{ (2, 4)  (3, 4)  (4, 4,)  (5, 4)  (6,4)  }

Answer

{ (3, 4)  (3, 5)  (3, 6)  (3, 7)  (3, 8)  }

Answer

{ (1,1)  (1,– 1)  ( 4, 2)  (4, –2)   (9, 3) }

Answer

{  (1, 2)  (2, 3)  (3,4)   (4,5)  (4, 6)  }

Question 10

The cost, C, in dollars, of renting a hall for the prom is given by the formula C(n) = 500 + 4n, where n is the number of students attending the prom.  Calculate the cost of renting the hall if 70        students attend.

Accepted Answer

$780

Answer

$500

Answer

$108

Answer

$970

Question 11

Which of the following relations are also functions?

Accepted Answer

I and III only

Answer

III only

Answer

I, II, and IV only

Answer

II and IV only

Question 12

Which ordered pair represents $f(3) = – 5$ ?

Accepted Answer

(3, – 5)

Answer

(– 3, 5)

Answer

(5, – 3)

Answer

(– 5, 3)

Question 13

Determine the domain and the range of .{(-3,3), (-2,2), (-1,1), (0,0),(1,1),(2,2)(3,3)}

Accepted Answer

{−3,−2,−1,0, 1, 2, 3, }

Answer

{0,−1, −2,− 3,}

Answer

{1,2,3,}

Answer

{0, 1, 2, 3,}

Question 14

Which of the following is not a linear function?

Accepted Answer

$f(x) = x^2 –  4 $

Answer

$f(x) = 3x – 4  $

Answer

$y = 5x + 2 $

Answer

$f(x) = -7x $

Question 15

Which of the following is a linear function

Accepted Answer

(0, 0), (1,1), (2,2)

Answer

(2, 5), (2, 10), (2, 15)

Answer

(0,1),(0,2), (0,3)

Answer

(1, 3),(2, 3),(3, 3)

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