WIN Slope

What is the y-intercept shown on the graph?

• (0, -2)
• (3, 0)
• (0, 3)
• None of these.

Bob has $150 in his savings account and saves $40 per month.  Which equation represents the amount Bob has in his account after x months?

• y = 150 + 40
• y = 40x + 150
• y = 150x + 40

Suppose that a bike rents for $4 plus $1.50 per hour. Write an equation in slope-intercept form that models this situation.

• y = 4x + 1.50
• y = 1.50x + 4

 In order to join an online learning community, there is a $20 startup fee and a $5 monthly fee. Write an equation in slope-intercept form that models this situation.

• y = 20x + 5
• y = 5x +20

A climber is on a hike. After 2 hours he is at an altitude of 400 feet. After 6 hours, he is at an altitude of 700 feet. What is the average rate of change? 

• 75 ft/h
• .013 ft/h
• 116.7 ft/h
• 200ft/h

A rocket is 1 mile above the earth in 30 seconds and 5 miles above the earth in 2.5 minutes. What is the rockets rate of change in miles per second? 

• .03 mi/s
• 30 mi/s
• 2 mi/s
• 30 mi/s

A car travels 60 miles in an 2 hours, what is its speed?

• 60 mph
• 30 mph
• .016 mph
• 15 mph

What is the rate of change for the following graph?

• 80
• 20
• 40
• 160

The graph shows the height (cm) of a candle as it burns, what does the y-intercept mean? 

• The initial height of the candle
• The amount the candle decreases per minute.