Find the slope-intercept equation of the line that passes through (-1, 2) and (-3, 4) and has a y-intercept of 3.
Graph this equation.
y = mx + b
Find the slope-intercept equation of the line that passes through (4, 4) and (6, 3) and has a y-intercept of 2.
Graph this equation.
y = mx + b

What do you notice about the lines?
How do you know this? (hint: look at the slopes!)