December 3, 2012 Writing Linear Equations from a table and graph Warm-up: Ridiculous Joe’s Cell Company has a monthly cell phone plan that includes a $35.

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Objective - To graph linear equations using the slope and y-intercept.

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December 3, 2012 Writing Linear Equations from a table and graph Warm-up: Ridiculous Joe’s Cell Company has a monthly cell phone plan that includes a $35 usage and data fee, plus $2 for every text message after 100 messages. If you received and sent 230 texts total this month, how much would your bill be?

Finding a pattern All linear functions have a consistent pattern. What was the pattern in the warm-up?

Lesson 4.8 Writing an Equation from Patterns xy Find the patterns in the tables. xy How can we translate this in an actual situation?

Find the pattern, then write the equation in function form and slope intercept form. xy x y xy

xy xy xy Write the equation of the linear function, then use it to find out when x = 20

Writing an equation by looking at a graph. y -5 x Write the ordered pairs in order from left to right in a table. xy 2. Use the table to write the linear equation.