1. Writing Equations from Tables
Mrs. Kuznia
Math 8
Day 54

2. Objective Given a table of x and y values, we can write an equation.
We do this by looking for patterns!!

3. Example x y 2 1 4 6 3 8 10 We need to use y= mx+b.2 1 4 6 3 8 10
We need to use y= mx+b.
We need to determine 2 pieces, the m and the b.
How do we get the m? Look in the y colums for a pattern. This is the m.
How do we get the b? Find the 0 in the x column, and match it with the y-value.

4. Continued x y 2 1 4 6 3 8 10

5. Example x y 10 1 6 2 3 -2 4 -6

6. Example x y 5 1 10 2 15 3 20 4 25

7. Example x y 2 3 6 4 9 5 12 15

8. Use the table to graph the appropriate line
Use the table to graph the appropriate line. Then, give the equation of the line. x y -2 1 -4 2 -6 3 -8 4
-10

9. Use the table to graph the appropriate line
Use the table to graph the appropriate line. Then, give the equation of the line. x y 1 5 2 3 4 -1 -3