Graphing Linear Models

The graph of linear function k passes through the points (-7, 0) and (1, 8). Which statement must be true?

• The slope of the graph is - 4/3

• The graph passes through the point (-1, -8)

• The zero of the graph is 7.

• The x-intercept is -7

Tags

A.3c

Which of the following situations could be descried by the equation y=120-25x?

• There are 120 people in the football stadium, and 25 more are entering each hour.

• A plumber charges $25 for a house call and $120 per hour.

• A teacher has 120 students. Her third period has 25 students

• There are 120 gallons of water in a tank. It releases water at a rate of 25 gallons per minute

Which statement below accurately represents the graph?

• $100 is earned for each hour worked

• $100 is earned for every 2 hours worked

• $500 is earned for every 8 hours worked

• $400 is earned for every 6 hours worked

Is this table proportional?

• Yes

• No

What makes a graph proportional?

• Linear

• The line is only in quadrant 1

• Curvy line

• Linear and the line goes through the origin

Which graph is proportional?

• A

• B

• C and D

• All of the graphs are proportional

Does the table represent a proportional relationship?

• Yes.

• No.

Using the graph above, determine the constant of proportionality.

• k = 0

• k = 1

• k = 3

• k = 6

Using the table above, determine the equation of the line.

• y = 5x

• y = 10x

• y = 1/5 x

• y = 1/10 x

The cost, c, of potato salad by its weight in pounds, p, at a deli is given in the table above.  Which equation best models this data.

• c = .29p

• c = 3.5p

• p = .29c

• p = 3.5c