Guillermo wants to purchase a new controller for his video game system. he has a $10 off coupon for big electronics. at costmart there is a 25% off sale on any item. regular price for the controllers at both stores is $49.99. write an inequality and tell where guillermo will get the better price.

Let p = item's price
 p-10=$39.99
.25p=$12.49
p-10>.25p

A.) 3.2 pounds package has a shipping cost of $4.13. We can't use the cost assigned to 3 lbs because the package is over 3 lbs but it is not over 4 lbs so we use the cost of 4lbs.

b) It is better to use a line graph where x values represent the weight in pounds and the y values represent the cost.

c) f(x) = 2.69 + 0.48(x-1)

d) domain is the x values; range is the y values