eQuizShow

Functions

Is it a functon?

Question:

Would the coordinate points be a function?

(3,6),(4,7), (5,7)


Answer:

Yes



Question:

       x

      y

      4

      7

      5

     7

     -2

    7

      0

    7


Answer:

Yes



Question:

       x

      y

      4

   6

      2

    3

     4

   9

      3

  0


Answer:

No



Question:

Would the following set of coordinate points be a function?

(3,7), (4,9), (0,6), (3,7)


Answer:

Yes



Question:

Which diagram is NOT a function?

 


Answer:

2



Evaluate the function

Question:

If f(x) =3x -9, what is f(-7)

 


Answer:

-30



Question:

If f(x) = -5x-9

what is f(4)


Answer:

-29



Question:

 

 

Given g(x)= -5x -5, what is g(x + 2)

 


Answer:

-5x-10-5

-5x-15



Question:

 

 

Given that f(x)= 9x + 7, what is f(b)

 

 


Answer:

9b+7



Question:

Given:

f(x) = 3x-1
g(x) = 2x +4

What is f(6) + g(2)


Answer:

17+8

25



More about functions

Question:

Which of the following is equivalent to y= -3x+4

a) -y= -3x +4

b) -y= 3x+4

c) f(x)=-3x +4

d) -g(x)=-3x+4


Answer:

c



Question:

Give an example of what may be happening between 6 and 11 seconds.


Answer:

stopping

 



Question:

Give 3  terms  (vocabulary terms) for the "y" values in the table

 

   x

    y

  3

   6

  4

   8

  5

  10

  6

  12

 


Answer:

output

range

dependent variable

f(x)



Question:

Given g(x) = 3x + 7, and the domain is (3,5,7) what would the range be?


Answer:

16,22,28



Question:


Answer:

returning home



Function Rules

Question:

Allison wants to buy shirts that cost $7 each. Write a function for the total cost (y) in relationship to the number of shirts (x)


Answer:

y= 7x



Question:

 

x

  y

3

7

4

10

5

13

6

16

What is the function rule?

 

 


Answer:

y = 3x-2



Question:

A taxi company charges a flat rate of $3.95 and $.35 per mile. Write a function rule that represents the cost (c) as a function of the number of miles (m) driven.


Answer:

c= 3.95 + .35m



Question:

The prom committee is planning the senior prom. The function P = $25t -$2500 shows the relationship between the profit(p) and the number of tickets.

What does the $2500 represent?


Answer:

expense of putting on the prom



Question:

According to the above graph, write a function that would represent the total salary based on the number of televisions sold (t)


Answer:

s=100+ 50t



What kind of function?

Question:

 

Linear, quadratic, or exponential?

 

 

 


Answer:

Linear



Question:

 

Linear, exponential, or quadratic function?


Answer:

Exponential.



Question:

Linear, quadratic, or exponential?

    X

         Y

1

3

2

9

3

27

4

81


Answer:

exponential



Question:

Linear, exponential, or quadratic?

 

    X

         Y

2

     5

         3

     10

        4

    17

        5

     26


Answer:

quadratic



Question:

What kind of function would represent the following situation?

A golfer hits a ball.

x = the time that has elapsed in seconds.

y = the height of the ball in meters.


Answer:

quadratic