Question 1: In the ordered pair (x,y), which is the independent variable and which is the dependent variable? In a function, the values of the independent variable are the Domain of the fuction and that values of the dependent variable are the Range of the function. Question 2: Describe how we know if a relation is a function or if a relation is not a function? A Linear Function is a graph of a straight line. Linear functions in the form f (x) = ax + b, where a is the slope and b is the y intercept of the graph. This is the same form as slope intercept form for the equation of a line y = mx +b. Question 3: If given a Linear Function f (a) = ax + b, how can we easily find two points to graph the line? When trying to find the equation of a line, we often use point slope form for the equation of a line and write the equation in slope intercept form, replacing the y with f(x) for function notation