1
.
5.
Find the value of r so that the line through (1, 4) and (-5, r) has a slope of 3
9. Find the value of r so that the line passing through (-4, r) and (-8, 3) has a slope of -5.
10. Graph the line that passes through (1, - 3) and has a slope of 4.
When reading, pay close attention to example 8:
How can you tell if two lines are parallel, perpendicular, or neither?