# Algebra Graphs and Functions

 A relation is a set of ordered pairs. A functions is a relation that has one _____ for an _____. One output, or range value for every one input, or domain value. Is this a function? {(-2,-1),(-1,0),(6,3),(-2,1)} No because (-2,-1) and (-2,1) have 2 output values for 1 input values. Use the vertical line test to see if it is a function or not. There will only be 1 point on a vertical line. For example, ..l / ..l/ ../ ./l = Yes / l \l .\ .l\ =NO .l/ ./ /l I understand Absolute Value functions make a shape of a ____ V To solve an absolute value question, you need to _______. Simplify it down to just the absolute value and then write 2 equations. l3rl+1>8.....-1..-13r>7-3r<7 A quadratic equation has an ________ and x as a ____, and forms a _______ A quadratic equation has an exponent and x as a base, and forms a parabula. To find the function rule, what would you do mathematically to __ to get __? Yep If the chart goes in order, like the one below, __________. x y 1 3__ 2 5<-l 2 3 7<-l 2 4 9<-l 2 Multiply by the difference of the numbers on the right. That charrt is 2x+1=y The direct variation equation is ____ y=kx The constant of variation, _, is the co-efficient of x, and x and y vary directly. k The equation for inverse variation is ____. xy=k Inverse variations vary inversely, meaning _____ One goes up, the other goes down. It's like a pulley. The points (3,8) and (2,y) vary inversely. Find the missing value. xy=k3x8=k24=k xy=k2y=24__..__2....2y=12 AuthorMoonRacer ID56414 Card SetAlgebra Graphs and Functions DescriptionReview of Graphs and Functions in Algebra Updated2011-05-17T20:21:40Z Show Answers