Unit 2 Study Guide

Select what points you would use to determine the domain of this function.

Select what points you would use to determine the range of this function.

What is the domain of this function?

• {-4,-1,0,7}

• (-4,-1,0,7)

• {-3,8}

• (-3,8)

Answer explanation

Discrete function (just points/ordered pairs) means SET NOTATION = {} Squiggly Brackets

Evaluate f(6) using the following function: f(x)=5x-20

Answer explanation

f(6)=5(6)-20

f(6)=30-20

f(6)=10

Which spot correctly uses the graph to evaluate f(-6)

Answer explanation

f(-6) means the input (x-coordinate) is -6

Which spot correctly uses the graphs to evaluate if f(x)=4, what is x?

Answer explanation

f(x)=4 means 4 is the output (y-coordinate)

Write an explicit arithmetic formula for the sequence: {5,3,1,-1,...}

• a(n)= -2n+7

• a(n)= 2n-7

• a(n)= -2n+5

• a(n) = 2n + 7

Answer explanation

Di N O

-2n + 7

Write an explicit arithmetic formula for the sequence: {-2 , 5 , 12 , 19 , ...}

• a(n)= 7n - 9

• a(n)= 7n + 9

• a(n)= -7n + 9

• a(n) = -7n - 9

Answer explanation

Di N O

7n -9

What is the range of the relation below?

{ (-4,1) , (-2,0) , (8,-1) }

• {-1 , 0 , 1}

• {-1 , 1}

• {-4 , -2 , 8}

• {-4 , -2 , -1 , 0 , 1 , 8}

Answer explanation

Range is the y-coordinates of each ordered pair

{-1 , 0 , 1}

Is this a function?

• Yes

• No

Answer explanation

There are no repeating inputs! It's a function.