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Algebra 3 Lesson 1.1 Objectives: SSBAT define slope. SSBAT calculate slope given 2 points. SSBAT determine the slope of a line from the graph. SSBAT determine if a line increases/decreases by analyzing the slope. Standards: M11.A.1.1.3 and M11.D.3.2.3
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Slope of a Line Denoted as m Measures how steep the line is - the greater the slope the steeper the line Rate of Change Ratio of Vertical Change over Horizontal Change
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Positive Slope The line will be going UPHILL from left to right. Negative Slope The line will be going DOWNHILL from left to right.
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Finding Slope of a Line from the graph m =
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Examples: Find the slope of the given line. 1.
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(x 1, y 1 ) and (x 2, y 2 ) are points on a line Finding Slope given 2 points on the line. Reduce the fraction in the end if you can
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1.Find the slope of the line containing the points Does the line go uphill or downhill from left to right?
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2. Find the slope of the line containing the points Does the line go uphill or downhill from left to right?
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3. Find the slope of the line containing the points Is the line a Horizontal or Vertical Line?
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4. Find the slope of the line containing the points Is the line a Horizontal or Vertical Line?
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Give an example of two points that would create a line to be undefined.
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Homework Worksheet 1.1
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