The vertical axis is used to represent one factor, such as price, while the horizontal axis is used to represent a second factor, such as quantity. The curve of market demand is negatively sloped from right to left, representing the law of demand, while the aggregate curve represents additional factors.
There also were 771 incidents of side effects assessed to be likely or definitely related to the use of the birth control shot, the findings showed. The most common were acne, increased libido, muscle pain, and mood and emotional disorders.
Short-term side effects are rare, but they can include the following: 1  Shrinkage and lightening of the color of the skin where you get the shot. 2  Infection. 3  Bleeding from broken blood vessels in the skin or muscle. 4  Soreness where you get the shot.