You can write them any way you like, as long as the basic definition of "function" is maintained. Basically, this means that the function must be defined uniquely defined for every input.
You can write it as Un or f(n) equal to some function of n, where the function can be anything at all.
i need to know how to function rule and a sketch of a graph
A function is any rule to assign a value (for example) to a variable "y", depending on the value of variable "x". Such a rule can be written in different ways; in algebra, it is common to write some equation, preferably one that is already solved for "y", such as: y = x2 + 3
Below is a rule that is an example of a non-linear function when b is 49, a is 7 and a is a function of b: a = square root of b 7 = square root 49 7=7
A turtle runs 3 mpm (meters per minute). Write a function rule that shows the total distance the turtle ran for any given amount of time (in minutes, m).
f(x)=.39x
write a function rule for the relationship shown here Number of Weeks Total Savings 1 $52 2 $64 3 $76 4 $88
You need to give an example of the rule and the function you want.
Measurement of length.
write a function rule for the relationship shown here Number of Weeks Total Savings 1 $52 2 $64 3 $76 4 $88
10y = x ======
write a rule as an equation