It's something an object or a person could do or be used for. Example: the function of a clock is to tell time.
describe the notch and its function in the story
Photosynthesis
watatat
Blood filter
No, x = 4 is not a function. I would describe x = 4 as the solution to an equation.
describe the structure of a fruit
True
describe the general business travel
describe alternative ways of organising the information systems function in a business
Yes, speed can be written as a function of time. The function would describe how the speed of an object changes over time. It can vary depending on factors such as acceleration, deceleration, and constant speed.
Describe the normal function of the hematic system
a function is a one-to-one and many-to one relation