Types of Slope By Billy Green Introduction • Slope is the measure of how steep a line is. • There are four types: 1. Positive- slopes up from left to right 2. Negative-slopes down from left to right 3. Zero-horizontal line 4. Undefined-vertical line The girl is running up a positive slope. The Leaning Tower of Pisa has a positive slope. This hill has a positive slope. This ski mountain has a negative slope. This slide has a negative slope. The top of this cake has zero slope. This cheerleader has her arm at a zero slope. This dog is sleeping in a zero slope position. These popsicle sticks have an undefined slope. This flag pole has an undefined slope.