Which inequality has a solid boundary line when graphed?

Which best explains why this triangle is or is not a right triangle?

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Select a graph that have an equation with a < 0