downwardfunction
nounUK /ˈdaʊnwəd ˈfʌŋkʃən/
US /ˈdaʊnwərd ˈfʌŋkʃən/
A downward function is a rule that makes the answer get smaller as the input gets bigger.
The teacher showed that the downward function made the graph slide lower and lower.
OTHER MEANINGS
2. In math, a function whose values go down as you move along the x-axis.
A downward function can be spotted because its line slopes down from left to right.
3. A job or role that pushes things lower or reduces them.
The machine's downward function lowers the heavy box to the floor.
4. A change that makes a number or amount go down over time.
The downward function of the thermometer showed the room was getting colder.