Slope-Intercept Form Review

Slope-Intercept Form Review

What is the equation of this line?

Slope-Intercept Form

• y = mx + b

• m is slope

• b is y-intercept

y-intercept

• Where line crosses y-axis

• y value when x = 0

• Starting point (in word problems)

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What is the y-intercept in this graph?

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What is the y-intercept in this graph? Write as an ordered pair

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What is the y-intercept of this graph? Write as an ordered pair

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An empty shipping box weighs 250 grams. The box is then filled with T-shirts. Each T-shirt weighs 132.5 grams. The equation W = 250 + 132.5T represents the relationship between the quantities in this situation, where W is the weight, in grams, of the filled box and T the number of shirts in the box. What is the y-intercept in this situation?

Slope

• Rise over run

• Δy/Δx

• Rate of change

• Pick points in the corners

What is the slope of the line from this table?

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What is the slope of this line?

What is the slope?

A battery is charged.

The percentage of the battery's capacity that is charged as a function of time (in minutes) is graphed.

Multiple Choice

What is the slope of the table?

• -2/5

• -5/2

• 5/2

• 2/5

Fill in the Blanks

An empty shipping box weighs 250 grams. The box is then filled with T-shirts. Each T-shirt weighs 132.5 grams. The equation W = 250 + 132.5T represents the relationship between the quantities in this situation, where W is the weight, in grams, of the filled box and T the number of shirts in the box. What is the slope in this situation?

Multiple Choice

Dave took a donut from the freezer and put it in the oven.

The donut's temperature (in degrees Celsius) as a function of time (in minutes) is graphed.

How fast did the oven heat the donut?

• 8 degrees Celsius per minute

• 10 degrees Celsius per minute

• 0.9 degrees Celsius per minute

• 0.8 degrees Celsius per minute