decreasing function
nounUK /dɪˈkriːsɪŋ ˈfʌŋkʃən/
US /dɪˈkriːsɪŋ ˈfʌŋkʃən/
A decreasing function is a math rule where the answer gets smaller as the input gets bigger.
The function f(x) = -x is a decreasing function because as x grows, f(x) shrinks.
OTHER MEANINGS
2. A function whose graph always goes down from left to right.
On the graph, the decreasing function slopes downward as you move right.
3. A function where a larger input always gives a smaller or equal output.
Because f(2) is less than f(1), the function is decreasing there.
4. A function with a negative rate of change over its whole domain.
Its derivative is always negative, so it is a decreasing function.