Learning Objectives:
1. Find the slope of lines.
2. Write linear equations given points on lines and their slopes.
3. Use slope-intercept forms of linear equations to graph (sketch) lines.
4. Use slope to identify parallel and perpendicular lines.

Problem #1: Find the slope-intercept form of the equation of the line that passes through the points (-1, 4) and (5, -12). Determine the slope and x and y-intercepts.

Problem #2: Determine whether the lines L1 and L2 passing through the pairs of points are parallel, perpendicular, or neither.
L1: (4, 8), (-4, 2)
L2: (3, -5), (-1, 1/3)

Problem #3: Write an equation of a line that passes through the points with an x-intercept of 2 and y-intercept of 4. What is the slope of this line?

Problem #4: