Functions Pre Test

What is a function?

• A unique relation where each output has one unique input

• A unique relation where each input has two unique output

• A unique relation where each input has one unique output

• My Uncle Fred's son

Which list of coordinate pairs shows a function?

• {(6,1),(4,2),(6,-3),(2,5)}

• {(5,8),(3,-2),(-2,5),(0,0)}

• {(-1,7),(2,8),(-3,2),(-1,6)}

What is the average rate of change between x= -4 and x= 0?

• 2

• 4

How do you find the x intercepts of a function?

• f(x)=0

  or

  Where the graph crosses the x intercept

• x=0

  or where the graph crosses the y intercept

• f(x)=0

  or where the graph crosses the (0,0)

Which of the following real-life relationships represent a function?

• The rule which assigns to each person the name of his aunt.

• The rule which assigns to each person the name of his father.

• The rule which assigns to each cellular phone unit to its phone number.

• The rule which assigns to each person a name of his pet.

Is this exponential growth or decay?

• Growth, because of 7

• Decay, because of 1.2

• Growth because of 1.2

• Decay because of 7

What type of function is f(x)=2(1/7)^x ?

• Exponential Growth

• Linear

• Exponential Decay

• None of the Abovee

What is the y-intercept of the function?

• 2

• 3

• 1

• -2

Is the graph linear, exponential or neither?

• Linear

• Exponential

• Neither

In an exponential function, what does the 'a' represent? 

• SLOPE

• RATE OF CHANGE

• INITIAL AMOUNT

• GROWTH OR DECAY FACTOR