A decreasing function is a function in which the y-values decrease as the x-values increase. In other words, as you move from left to right on the graph, the curve slopes downward.
Related terms
Increasing Function: A function where y-values increase as x-values increase.
Monotonic Function: A function that either always increases or always decreases; it does not change direction.
Inflection Point: A point on a curve where the concavity changes, from being upward to downward or vice versa.