Slope of a Line

• How do we calculate the slope of a line?

rise

run

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Rise / Run

• The formula slope = rise/run looks a lot like a formula we just used in the density investigation

• Which one?

density = mass/volume

Make the Connection

• So… if the formula for slope is:slope = rise / run

• And the formula for density is:density = mass / volume

What does the slope of a mass v volume graph represent?

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Make the Connection

• The slope of a mass v volume graph represents the density.

• In your small groups, graph the data on the next page

Density Data

mass

• 10 g

• 20 g

• 30 g

• 50 g

volume

• 20 cm3

• 40 cm3

• 60 cm3

• 100 cm3

Graphical information

• Using only your graph, calculate the density of the unknown object