Question

is y=x+1 a function

Answer 1

Firstly you must know what a function is to answer that question. Do you know what a function is?

Answer 2

Yes

Answer 3

I just know how to figure out the equation

Answer 4

What's the definition of a function then?

Answer 5

An equation or expression that involves one or more variables

Answer 6

Then according to your definition, is y=x+1 a function?

Answer 7

Yes

Answer 8

But i want to know how to work out the equation for future problems

Answer 9

like for x=2y^2 .. i would assume its a function but how do i work it out so i know for sure

Answer 10

hmmm according to your definition, if it's an equation or an expression, then you know it's a function.

Answer 11

Therefore, as long as you know the what an equation and what a expression is, you should be able to work out whether it's a function?

Answer 12

But most of the problems have more than one variable but i know that all the answers arent all function..

Answer 13

A function is a relation between 2 variables usually (x, y) such that for any value of x (input) there is only one value for y (output)

given an equation with both variables rewrite to put in the form y = (whatever)
the domain is the set of x values that is used . For each x-value find the corresponding y-value.
The range is the set of y-values from lowest to highest.