Interpreting Linear Graph

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

• Candle starts at 9 cm.
• Candle start at 4.5 cm
• Candle starts at 0 cm.
• The candle ends at 5 cm

The graph shows the candle's height (cm) as it burns (minutes).  What does the slope MEAN?

• The candle burns 1 cm every minute.
• The candle burns 2 cm every 2 minutes.
• The candle burns 2 cm every minute.
• The candle burns 1 cm every 2 minutes.

The equation y=10x represents the amount of allowance, y, in dollars, that Jacob receives for doing x hours of chores. Which statement interprets the slope of this equation?

• Jacob does chores for $0 per hour.
• Jacob does chores for $10 per hour.
• Jacob receives $0 of allowance money before doing any chores.
• Jacob receives $10 of allowance money before doing any chores.

What type of association does this graph have?

• positive
• negative
• none
• all of the above

What does the slope represent in this situation?

• The sloth runs 1 feet in 3 minutes
• The sloth runs 3 feet in 1 minute
• The sloth runs fast
• The sloth runs 6 feet in 1 minute

At what rate did the rain fall?

• 2 cm per hour
• ¹/₄ cm per hour
• ¹/₂ cm per hour
• 4 cm per hour

Which company shows a greater rate of change?

• Water's Edge Rafts
• Ryan's Rafts

Which situation below is representative of y-intercept?

• putting $300 a month into savings
• buying $30 worth of supplies for a lemonade stand
• Spending $3 per ride at the fair
• Paying $2 for parking every day

A holiday meal costs $12.50 a person plus a delivery fee of $30.  Which equation represents the amount a holiday meal costs, including delivery, for x people?

• y = 30 + 12.5x 
• y = 12.5 + 30
• y = 12.5 + 30x

Sandra has a $20 itunes gift card and spends $3 each month.  Which equation can be used to find how much money Sandra has on her giftcard after x months?

• y = 3x + 20
• y = 3 + 20x
• y = -3x + 20
• y = -20x + 3