LT1a/1b Interpreting functions review

Is the graph a function?  Why?

• Yes, it's a perfect circle.
• No, if I draw a vertical line, it crosses twice.
• Yes - if I draw a vertical line, it crosses only once.
• No - it's a perfect circle.

Tags

CCSS.HSF.IF.A.1

CCSS.HSF.IF.B.5

Is this table a function?  Explain.

• Yes, because none of the inputs repeat.
• Yes, because the inputs repeat but have the same output
• No because the inputs repeat
• No because the inputs repeat and have different outputs

Tags

CCSS.8.F.A.1

Consider the function f(x)=9x+5.  Find f(7).

• 102
• 68
• 7
• 21

Tags

CCSS.HSF.IF.A.2

Derek works at Subway making $9.25 an hour.  The function d(x)=9.25x tells us how much money Derek makes after x hours of working.  What is the meaning of d(4)=37?

• After 4 hours of work, Derek makes $37.
• Derek needs $4 more to have $37 total.
• After working for 4 days, Derek makes $37 total.
• After 4 hours of work, Derek now makes $37 an hour instead of $9.25.

Tags

CCSS.HSF.LE.B.5

Ms. Brackemyer is collecting pencils.  The function p(x)=5x+12 tells us the total amount of pencils Ms. Brackemyer has after collecting for x number of days.  What is the meaning of p(8)=52?

• Ms. Brackemyer starts with 8 pencils and ends with 52.
• After 8 days, Ms. Brackemyer has 52 pencils.
• Ms. Brackemyer starts with 52 pencils and gets 4 more every day.
• Every day, Ms. Brackemyer gets 4 new pencils until she has 52.

Tags

CCSS.HSF.LE.B.5

The temperatures in NYC were tracked in this graph.

What does the point (3, 50) represent?

• On the third day, it was 50 degrees F.

• It was only 3 degrees F on day 50.

• The temperature rose 3 degrees on day 50.

• None of these.

Tags

CCSS.HSF.IF.B.4

Suppose you tracked how many facts you got right in class with this graph.

What does the point (2, 4) represent?

• On day 2, you got 4 facts correct.

• You got 2 facts correct on day 4.

• You got a total of 6 facts correct.

• On day 3, you got 12 facts correct.

Tags

CCSS.HSF.IF.B.4

Does the mapping diagram represent a function? Explain.

• No; the input values (x-values) of 1 and 3 are both paired with the same output (y-value).

• No; there are more input values (x-values) than output values (y-values).

• Yes; each input (x-value) is paired with only one output (y-value).

• You can't tell if a relation is a function from a mapping.

Tags

CCSS.8.F.A.1

Which graph is a function?

• Graph #1

• Graph #2

• Graph #3

• They are all functions

Which of the following is NOT a function?

• A

• B

• C

• None of these are functions