Math 120 SP08 Test #1 Review: 1.1 – 2.3 Brodnick 1.1: Functions from Numerical and Algebraic Viewpoints *independent variable ( x ), dependent variable ( y ) *evaluating functions at a point (“plugging in” to a function) *evaluating piece-wise functions *domain of a function 1.2: Functions from the Graphical Viewpoint *given the graph of a function, be able to obtain the value of the function at given x-values *vertical line test *graphing piece-wise functions *functions you should know and recognize 1.3: Linear Functions *slope-intercept form: y = mx + b m : slope b : y-intercept *slope 1 2 1 2 x x y y run rise m--= = where ) , ( 1 1 y x and ) , ( 2 2 y x are points on the line *parallel lines have the same slope; perpendicular lines’ slopes are opposite reciprocals of each other 1.4: Linear Models *Cost: b mx x C + = ) ( m : marginal cost b : fixed cost *Revenue: mx x R = ) ( m : marginal revenue *Profit: )) ( ( )) ( ( ) ( x C x R x P-= *Demand function: b mp p q + = ) ( p : unit price
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 04/07/2008 for the course MAT 120 taught by Professor Brodnick during the Spring '08 term at Illinois State.