1. 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?

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

3. Lesson 4.8 Writing an Equation from Patterns xy -2 0 1 2 1 3 5 7 Find the patterns in the tables. xy 0 3 6 9 12 2 4 6 8 10 How can we translate this in an actual situation?

4. Find the pattern, then write the equation in function form and slope intercept form. xy 0123401234 16 13 10 7 4 x y -2 0 1 2 1. 2. 3. 23 18 13 8 3 xy -2 0 1 2 -8 -2 4 10 16

5. xy -10 -5 0 5 10 20 -13 -9 -5 3 4. 5. xy 3 6 9 12 15 20 -8 -15 -22 -29 6. xy 3 2 1 0 20 -7 -2 3 8 13 Write the equation of the linear function, then use it to find out when x = 20

6. Writing an equation by looking at a graph. y -5 x 5 5 1. Write the ordered pairs in order from left to right in a table. xy 2. Use the table to write the linear equation.