Line is Positive, Negative, Infinite or Zero

In the graphs below (a through f), which contain(s) a line with a positive slope? A negative slope? Slope of zero? Infinite slope?

In the graphs below (a through f), which contain(s) a line with a positive slope?
 In both (c) and (d), the line is sloping upward to the right. This means that the lines in each of these graphs have a positive slope.
 A negative slope? In both (a) and (e), the lines are sloping downward to the right. This means that the lines in each of these has a negative slope.
 Slope of zero? In (f), the line is horizontal. This means that the line in this graph has a slope of zero.
 Infinite slope? In (b), the line is vertical. This means that the line in this graph has an infinite slope.

If you feel comfortable with this material, move in to the next section of this unit.

If you still do not understand how to determine if the slope is positive, negative, zero or infinite, you may need more review than is offered by this booklet. If this is the case, please speak with your professor for suggestions on how to get help.