1. 1.2 The Method of Substitution

2. Intersection of Lines Yesterday we talked about solving when two lines intersect… – How did we do that? – Are they equal to each other there?

3. Intersection of Lines Today we are going to find out a new way of finding when two lines are equal.

4. Can I solve this?

5. How about that?

6. Planes again…

7. Substitution The Process Step 1: Isolate one variable (whichever is easier) Step 2: Plug whatever variable you isolated into the other equation Step 3: Substitute back into one of original eq n to find missing info Step 4: Check your answer

8. Substitution

9. Questions Pg 26 #’s 1-6,8,15