Question

Marshall is comparing different companies that rent sound systems The total cost, y , for each company includes a used rental fee plus an additional fee based on the number of hours, x , the sound system is rented. Which company had the lowest additional fee per hour for renting a sound system?

Answer 1

Company B

Explanation:

Given

See attachment for graph

Required

Company with the least additional fee

This means the y-intercept and it represents the flat fee

To get the y-intercept, we simply write out the point where
`x= 0`

From the graph of A, we have:

`(x,y) = (0,70)`

Additional Charges = 70

From the table of B, we have:

`(x,y) = (0,50)`

Additional Charges = 50

From the equation of C, we have:

`y=10x+ 90`

`y(0) = 10 * 0 + 90`

`y(0) =0 + 90`

`y(0) =90`

Additional Charges = 90

By comparison. company B has the least additional fee because:
`50 < 70 < 90`