1. Aim: How do we graph lines using a table?
Do Now:
Evaluate 3a – b for a = 2 and b = -5
List as many pairs whose sum is 6.

2. Evaluate 3a – b for a = 2 and b = -5

3. List as many pairs whose sum is 6.
Can -1 and 7 be a pair?
5.5 and .5?
π and 6 – π?
and ?
100 and – 94?
3 and 5?
How do we express two numbers whose sum is 6?
x + y = 6

4. When graphing…
Label the x-axis and y-axis
Plan how to scale
(would it make more sense to count by 1s? 2s?)
Make sure you move along the x-axis first, then the y-axis. Follow the order of the coordinate point (x,y)

5. List as many pairs whose sum is 6.x

6. x + y = 6
What do you think we call this equation? A linear equation is an equation whose graph forms a straight line.

7. Graphing a linear equation steps
Create a table of values
Plot points
Draw a line through the points

8. Graph y = -2x + 4 x
y =-2x + 4 y 1 2

9. x y 4 1 2

10. Try! Complete table of values and graph!
y = 4x x
y = 4x y

12. Practice: Graph the following equations:
1. y = 3x y = -3x 3. y = -2x x + 3 = y

14. Is (4,2) a solution for the equation 2x – y = 6?

15. Is (0,6) a solution to the equation 2x – y = 6?

16. Try! Is (4,-2) a solution to 2x – y = 6?

17. Practice! – state in each case whether the point whose coordinates are given is on the graph of the given equation
X + y = 7
2) 2y + x = 7
3) 2y = 3x – 5
(4,3)
(1,3)
(-1,-4)
When you are done, get the textbook and open to page 350. Do problems 10 – 12;

18. Is ( 3, 7) a solution to y = 2x – 1? Why or why not?
Exit slip
Is ( 3, 7) a solution to y = 2x – 1? Why or why not?