Linear Not Linear and Function

The cost of a plumbing repair includes a $50 fee plus a cost of $15 per hour. What does the $50 fee represent?

• x-intercept

• y-intercept

• slope

• point of intersection

Which of the following is NOT a correct description of the graph of the function y=-2/3x+6?

• The graph of the function is a line that passes through (0,6) with a slope of -2/3.

• When the x-value increases by 3 units the y value decreases by 2 units.

• The graph of the function contains the points (3,4), and (6,2), (-3,8)

• The graph of the function contains the points and (6,2), (3,8), (9,12).

Which equation describes a line with a slope of –4 and y-intercept of –3?

• y = -4x - 3

• x = -4y - 3

• y = -3x - 4

• x = –3y – 4

Indicate whether the quantitative relationship is a linear function.

• Linear Function

• Not a Linear Function

Indicate whether the quantitative relationship is a linear function.

• Linear Function

• Not a Linear Function

• (1,3)

• (4,4)

• (6,0)

• (7,2)

• (9,7)

Charlie & Susan are planning a party for 10 people. *Charlie's location charges an initial fee of $20 plus $25 per person. *Susan's location whose cost is represented by the equation y=15x+100, where x is the # of people and y is the total cost. Select all the statements that are true.

• Charlie's location is a cheaper than Susan's location.

• Susan's location is cheaper if you only have 10 people.

• The charge for each additional person is greater for Susan's location

• The charge for each additional person is greater for Charlie's location.

• If the number of people at the party changes to 12, the total cost at each location is the same.

Which graph represents a linear function?

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Lyla and Dwayne each sell tickets at a concert. They start selling the tickets at the same time. Lyla starts with 500 tickets and sells them at an average rate of 5 tickets per minute. The number of tickets, t, Dwayne has left after m minutes is represented in the table shown. Which statement is true?

• Dwayne's average rate of tickets sold per minute is higher than Lyla's average rate.

• Lyla's average rate of tickets sold per minute is higher than Dwayne's average rate.

• Dwayne begins with more tickets than Lyla.

• Lyla begins with more tickets than Dwayne.

Which graph shows a function that is increasing at a constant rate?

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