Slope Review

Which of the following equations shows a slope of -1?

• $y=-1$

• $y=x-1$

• $y=x$

• $y=1-x$

Scientist have been keeping track of the size of a glacier in the middle of the ocean. When they first began to track it, it measured 450 meters in width and it is melting at a rate of 4.5 meters per year.
If the width,  $w,$  is a function of the time,  $t,$  in years,
which of the following equations best describes this situation?

•  $w=450t-4.5$  

•  $w=450-4.5t$  

•  $w=450+4.5t$  

•  $w=-450+4.5t$  

A scuba diver is descending at a rate of 15 ft per minute. Which graph has a slope that best represents this rate?

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Hayden makes $10 from every 2 glasses of lemonade he sells. Which graph models a relationship with the same unit rate?

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Mrs. Soto can decorate 5 cupcakes in 2 minutes. Which graph has a slope that best represents the number of cupcakes per minute Mrs. Soto can decorate?

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What is the slope of the table?

• 15

• 6

• 1/6

• -6

What is the slope of the table?

• 1/2

• 2

• -2

• 3

Find the slope

• 7/3
• 3/7
• -3/7
• -7/3

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:  3  y-intercept:  (0,3/2)
• slope: 3/2   y-intercept:  (0,5) 

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