Question 53366
A BOKSTORE MANAGER PLANS TO SPEND $60.00 ON PENS AT .30 CENTS EACH AND PENCILES AT .10 CENTS EACH. THE EQUATION 0.10X+0.30Y=60 CAN BE USE AS THE MODEL THIS SITUATION
· WHAT DO X AND Y REPRESENT?
X is the number of 10 cent pencils; Y is the number of 30 cent pencils. 
· GRAPH THE EQUATION
· WRITE THE EQUATION IN SLOPE INTERCEPT FORM.
Y=(60-0.10X)/0.30
Y=(-1/3)X + 200
· WHAT IS THE SLOPE OF THE LINE?
-1/3
· WHAT DOES THE SLOPE TELL YOU?
As the number of 10 cent pencils increases by one the number of 30 cent
pencils decreases by 1/3.
Cheers,
Stan H.