Lots of students were attending e-Conference today with DECA.

After discussing questions from practice sheets 81 & 82 – Writing equations of lines given one-point & slope / given 2-points; Specifically page 82 #8 and 11…

#8 (4, 8) (4, -2) When we graph these points – we have a vertical line; when we calculate slope, we have undefined slope – so how do we write an equation to represent this line? What do you notice about the points? The x’s are both 4. Eq: x = 4

#11 (0, 2) (-4, 2) When we graph these points – we have a horizontal line, when we calculate the slope, we have zero slope – so how do we write an equation to represent this line? y = 0x + 2…OR we could simply look at the points, notice the y’s are both 2. Eq. y = 2

During class, we looked at writing equations for parallel & perpendicular lines. See links for examples.

3 practice problems:

Also – HW! Retake your Linear Pre-Test!