Standard Form

Slope intercept; y=mx+b

Standard form; Ax+By=C   A,B,C are all integers, no fractions

                                             to graph use x-intercept and y-intercept  

ex. graph using intergers.

                2x+3y+12

               x-int 2x=12  x=6

               y-int 3y=12  y=4   

ex write in standard form

           y=3/4x+2

          4y=3x+8

          -3x+4y=8

ex. a 150lb person can burn 10cal/min biking and 12cal/min swimming laps                            

write an equation showing how many minutes of biking and swimming are needed to burn 300 cal

biking=10x     swimming=12y    10x+12y=300 

10x=300 x=30        12y=300     y=25