Comparing Functions in the Real World — Unit test Answers

What is the point-slope form of a line that has a slope of and passes through point (–7, 2)?

The local theater sells tickets to its plays at a rate of $38 each. Patrons who attend multiple shows are encouraged to buy an annual membership for $80. Members are able to buy tickets at a discounted rate of $20 each. Roger expects to attend 6 shows this year. Grace expects to attend 4 shows. Who would benefit from buying a membership this year?

The equation of the line that passes through points and is shown below. What value is missing from the equation?y =

What is the y-intercept of a line that has a slope of –3 and passes through point (–5, 4)?

Jill converted the equation of the line into slope-intercept form and found the slope and y-intercept of the line as follows.What was her mistake?

What can be concluded about a line that passes through the points and ? Check all that apply.

For spring cleanups, a landscaper charges a flat fee of $60 plus $20 for each hour of labor. Which equation models the cost in dollars, c, for a cleanup that requires h hours of labor?

Jodi is considering taking online classes at two websites, LearnCenter and EduWorld. Each site requires that students pay a base membership fee, plus they charge a rate per class. The two graphs show the cost for taking online classes through the two websites.Which statement best describes the functions that model the costs to take classes at each site?

The value of a baseball card can be represented by the equation , where x represents the number of years that Robert has owned the card and y represents the total value, in dollars, of the card. What was the value of the card when Robert originally purchased it?

Consider the linear function that is represented by the equation and the linear function that is represented by the equation . Which statement is correct regarding their slopes and y-intercepts?

A local public library decides to track the number of hours that a certain computer is being used. The table represents the number of hours, y, which is dependent on the number of days, x. xy321537753What is the linear equation that represents this situation?

Which equation represents the line that passes through points (0, 6) and (2, 0)?

A computer technician charges a flat base fee plus an hourly rate for all repairs. Last year, she used the formula to determine the cost in dollars, y, of a repair that required x hours of work. If she doubles her base fee this year, what equation should she use to determine the new cost of an x-hour repair?

Which linear function has the same y-intercept as the one that is represented by the graph?

Inez has a phone card. The graph shows the number of minutes that remain on her phone card after a certain number of days. The slope of the line that represents the data is –50, and the y-intercept is 850. What do the slope and y-intercept represent in Inez’s situation?