Relationships Between Functions

Which of the statements about the graph below is true?

• The graph is proportional and has an equation of y = -x +18.

• The graph is non-proportional and has an equation of y = -x + 18.

• The graph is non-proportional and has an equation of y = -2x + 18.

• None of the above statements are true.

The table below shows the amount that a catering company charges based on the number of people at an event. Which of the following equations shows the relationship between c, the amount the company charges based on p, the number of people at the event?

• c = 16p

• c = 75p + 13

• p = 13c + 75

• c + 13p + 75

The following set of ordered pairs represents y as a function of x.

{(9, 8), (-2, -14), (6, 2), (-3, -16), ( __, __)}

Which of the following could be the missing ordered pair?

• (9, 8)

• (-3, 9)

• (-9, 8)

• (6, -2)

Which is true about the table and the graph shown below?

• Only the table shows a proportional relationship.

• Only the graph shows a proportional relationship.

• Both the table and the graph show a proportional relationship.

• Neither the table nor the graph show a proportional relationship.

The relation ​ (a)   a function.

• is not

• is

• a
• b
• c
• d

Is the function increasing or decreasing from 2 < x < 6?

• Increasing

• Decreasing

The graph shows the total distance, in feet, walked by a person as a function of time, in seconds.



​​​​​​Was the person walking faster between 20 and 40 seconds or between 80 and 100 seconds?

• 20 and 40 Seconds

• 80 and 100 Seconds

Is the graph increasing, decreasing or both?

• It is not increasing or decreasing

• increasing

• decreasing

• both

Which statement is true about this graph?

• This function is always constant

• This function is always increasing

• This function is never increasing

• This function is both increasing and decreasing