

Function:
An equation with two variables (lets call them x and y).
Where for every value of x there is only one value of y. *Domain: The set of all possible values for x. *Range: The set of all values of y Example: y = 2x +1 where the domain is {2, 1, 0, 1, 2} To solve plug in all the values of x into the equation using a t chart .


Make a table of input and output for the above
function when There is a constant rate of 

Function: d = 2t 

Input (time) (t)  Output (distance) (d) 
5  10 
10  20 
15  30 
20  40 
25  50 