Equations of Lines

If you are asked to find an equation for a line, immediately write down y = mx + b because that's where you are headed. Sometimes you are given a point and a slope; other times you are given two points. That's all the information you need.

If you are given a graph and need to read points, make sure you are 100% accurate when you read the coordinates. Sometimes, if the graph is very clear, you can read the y-intercept and count off the slope, like you did last night.

Check out this website. It explains point-slope form (NOT slope-intercept form) for the equation of a line. That's what tonight's homework is about. The website uses (x sub 1, y sub 1) instead of (h, k) for the given point.

Homework:

• Finish Lesson 6-4
• Complete Covering the Ideas in 6-5.