Slope Situations

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 class has 25 students.

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

What type of slope?

• negative

• steep

• undefined

• zero slope

Find the slope

• 5/2

• -5/2

• 2/5

• -2/5

Determine the slope and y-intercept from the following equation:   y = 3/2x + 3

• slope: 5   y-intercept:  (0,3) 

• slope: 3/2   y-intercept:  (0,3) 

• slope:  4  y-intercept:  (0,3/2)

• slope: 1/5   y-intercept:  (0,5) 

Write the equation of the line.

• y = -2/3x + 4

• y = 2/3x + 4

• y = 3/2x + 4

• y = -3/2x + 4

Which equation has a positive y-intercept and a negative slope?

• y= 3x - 5

• y= -3x + 5

• y= -3x - 5

• y= 3x + 5

What type of slope?

• negative

• positive

• zero slope

• downward slope

Steve started with $250 and spent $25 per week. Chelsea started with $30 and saved $30 per week.

Which two equations represent these situations?

• y = 250 - 25x

• y = 30 + 30x

• y = 250x + 25

• y = 30x - 30

What type of slope?

• undefined

• positive slope

• negative slope

• zero slope

What is the y-intercept of this graph?

• (0,1)

• (0,-2)

• (0,0)

• (0,3)