Definition
Input
An input is an allowed value supplied to a function or rule to determine an output.
Continue from this idea into connected AXIO math.
Defining relationship
Input goes in before the rule acts.
An input is a value from a function’s domain that is supplied to the function or rule; the function assigns that input one corresponding output.
What it means
Choose an allowed value and put it into the rule. Follow the rule’s steps to find what comes out. The input is the starting value for that function calculation, not every number written nearby.
Remember it
Input goes in before the rule acts.
Example
For y = 3x + 2, choose input x = 4. The rule gives 3 × 4 + 2 = 14, so 4 is the input and 14 is its output.
Watch for
The number 3 in the rule 3x + 2 is a coefficient, not the input in this example.
Common mix-up
Input does not mean any answer entered into a device; here it means a value in a mathematical input-output relationship.
Exact meaning
An input is a value from a function’s domain that is supplied to the function or rule; the function assigns that input one corresponding output.