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Slope of a line
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Daisy makes $5.00 an hour. Hester makes $20.00. Show the relationship between their hourly rate and their Gross pay. Graph these two relationships.What are the four ways we can show this data?
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Daisy makes $5.00 an hour. Hester makes $20.00. Show the relationship between their hourly rate and their Gross pay. Graph these two relationships.
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The Graph of a relationship is picture of that relationship.
The graphs we found yesterday were all straight lines.
Each straight line had a different steepness.
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Steps for Finding Slope
1) Choose two points from the table or graph.2) Label one point A and one point B3) Draw a line from point A to the xaxis. Record the number XA.4) Draw a line from point B to the x axis. Record the number XB.5) Find the value of XB XA6) Draw a line from point A to the yaxis. Record the number YA.7) Draw a line from point B to the y axis. Record the number YB.8) Find the value of YB YA9) Find
Change in gross payChange in hours worked
slope = change in Y change in X
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Slope is how much the dependent variable changes conpared to the independent variable.
Also called a rate.
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Assignment
Read Exploration 2 on page 256.
You will need to pay attention to how slope is calculated as well as what the slope represents.
Do questions 15. Be sure you understand what the slope represents in each case.