Analyzing Graphs of Linear Equations in Real Life Situation

True or False.
The following table of ordered pairs form a straight line when plotted.

• True

• False

What is the equation for this graph?

• y = ⅔ x + 3

• y = -⅔ x + 3

• y = ⅔ x - 3

• y = -⅔ x - 3

What is the equation for this graph?

• y = ⅔ x + 3

• y = -⅔ x + 3

• y = ⅔ x - 3

• y = -⅔ x - 3

What is the equation for this graph?

• y = ⅔ x + 3

• y = -⅔ x + 3

• y = ⅔ x - 3

• y = -⅔ x - 3

What is the equation for this graph?

• y = ⅔ x + 3

• y = -⅔ x + 3

• y = ⅔ x - 3

• y = -⅔ x - 3

What is the equation for this graph?

• y = 4/3 x + 1

• y = 3/4 x + 1

• y = 4/3 x - 1

• y = 3/4 x - 1

What is the equation for this graph?

• y = -⅕ x - 2

• y = -5x - 2

• y = ⅕ x - 2

• y = 5x - 2

What is the equation for this graph?

• y = -3/7x + 4

• y = -7/3x + 4

• y = -3/7x + 10

• y = -7/3x + 10

The Roaming Cell Phone Company charges $15.00 per month plus $0.20 per minute of airtime usage.  If Juanita uses x minutes of airtime, what is an equation that can be used to determine her monthly cell phone bill (C)?

• C = 15 + 0.20x

• C =15 (0.20x)

• C = 15 + x + 0.20

• C = 0.20 + 15x

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

• 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