Interpreting Functions with Graphs

Which of the following represents the range of the graph?

Which of the following represents the y intercept of the function?

• y = -4.5

• (0,-4)

• (3,0)

• y = 8

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.

Which of the two linear functions above has the higher rate of change?  Explain.

• The blue one because it is the most steep.

• The blue one because it is the least steep.

• The green one because it is the most steep.

• The blue one because it is the least steep.

Is the graph a function?  Explain.

• Yes, because if I draw a vertical line, it only crosses once.

• No, because if I draw a vertical line, it crosses more than once.

• No because it is not a straight line.

• Yes because it looks like an S.

Is the graph a function?  Explain.

• Yes, because if I draw a vertical line, it only crosses once.

• No because if I draw a vertical line, it crosses more than once

• Yes because it does not go into the negative numbers

• No because it's not a straight line

What is the domain of the function?

• All real numbers

• All real numbers greater than -3

• All real number less than -3

• All real numbers except -3

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.

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.

What is the meaning of the y-intercept?

• The weight in the bucket increases by 1 pound per pound of sand.

• Before sand is put in the bucket, it weighs 1 pound.

• The starting weight of the sand is 1 pound.

• The weight in the bucket decreases by 1 pound per pound of sand.