a function is a one-to-one and many-to one relation
It means the solution (which is a function) does not have a limit on at least one side
A formula or graph are two ways to describe a math function. How a math function is described depends on the domain of the function or the complexity of the function.
If you mean 1/x (some symbols get lost in the questions), that is called the reciprocal. It means, for any given number, find a number which, when multiplied with the given number, gives 1. Or equivalently, simply one divided by the given number.
That sounds really comlicated.
a function is a one-to-one and many-to one relation
it is weak
Yes, Schroedinger's Cat for one. Look it up, as it's one of the best ways to describe Schroedinger's wave function in verbal means. There is also the philosophical question, "If a tree happens to fall in the woods, and no one is around to hear it or see it fall, did it really fall?", which can be related to Schroedinger's wave function.
describe the notch and its function in the story
No. If the function has more than one x-intercept then there are more than one values of x for which y = 0. This means that, for the inverse function, y = 0 should be mapped onto more than one x values. That is, the inverse function would be many-to-one. But a function cannot be many-to-one. So the "inverse" is not a function. And tat means the original function is not invertible.
describe the structure of a fruit
function
The word synaptic is an adjective which means, pertaining to the synapses. So, I could describe dopamine as a chemical that has a synaptic function, as a neurotransmitter.
describe the general business travel
True
describe alternative ways of organising the information systems function in a business
It means 'Describe your school'