Equations of Proportional Relationships

A deli charges the same price, $5.20, for all of its different sandwiches. If a company ordered n sandwiches for a luncheon, which equation could be used to find the total price, P, that the deli charged for the sandwiches?

• n/$5.20 = P
• $5.20/n = P
• $5.20n = P
• $5.20 + n = P

Given the graph above, which is true?

• The line that passes through the given coordinates does not represent a proportional relationship because the line passes through the origin
• The line that passes through the given coordinates represents a proportional relationship because the line does not pass through the origin
• The line that passes through the given coordinates does not represent a proportional relationship because the line does not pass through the origin
• The line that passes through the given coordinates represents a proportional relationship because the line passes through the origin

The graph shows how many sodas that employees consume each day at a certain company.  Based on the graph, what does the point (2,80) represent?

• 80 sodas consumed in 2 days
• 2 sodas consumed in 80 days
• 2 sodas consumed in 40 days
• 40 sodas consumed in 2 days

Given the graph shown, which (if any) of the points would be part of a proportional relationship?

• both red and blue
• neither red nor blue
• red is but blue is not
• red is not but blue is

Does the table represent a proportional relationship?

• No, because the ratios of y to x are not equal.
• Yes, because all the ratios of y to x are equal to -4
• Yes, because all the ratios of y to x are equal to -2.
• No, because the table has negative numbers.

The graph shows how much money an organization hopes to raise in a fundraiser each month.  Based on the graph, what does (0,0) represent.

• $0 is raised at the beginning of the fundraiser
• $0 will be raised in the first month of the fundraiser
• $0 is expected to be raised in the fundraiser
• the fundraiser will last 0 months

A singing competition is auditioning 40 contestants each hour for the next h hours. Which equation can be used to find the total number of contestants, C, that audition in h hours?

• 40/h = C
• h/40 = C
• 40+h = C
• 40h = C

The amount Kathleen has to pay for a doctor visit and the amount the insurance company pays are in a proportional relationship. Based on the graph, what does the point (20, 30) represent?

• Kathleen and the insurance both pay $10.
• Insurance pays twice as much as Kathleen.
• If Kathleen pays $20, the insurance pays $30
• If Kathleen pays $30, the insurance pays $20.

Which of these equations represents the equation when 11 pounds of apples is $40.59?

• t=$3.69n
• t=$3.62n
• t=$3.65n
• t=$3.68n

Ronald can read at a constant rate of p pages per minute. Which equation represents the relationship between the total number of pages, N, that Ronald can read in m minutes?

• N=m/p
• N=p/m
• N = pm
• N = p + m