Final answer:
Sally sells 3 pies in (1)/(4) of an hour, so by setting up a proportional relationship, it can be determined that she will sell 12 pies if she continues at the same rate for one hour.
Step-by-step explanation:
If Sally sells 3 pies in (1)/(4) of an hour and she continues at the same rate, to find out how many pies she will sell in one hour, we need to set up a proportional relationship. The equation representing this situation is:
3 pies / (1/4) hour = x pies / 1 hour
By cross-multiplication, we find:
(3 pies) * (1 hour) = x pies * (1/4 hour)
3 * 4 = x
Hence, x = 12 pies
So, if she continues at the same rate, Sally will sell 12 pies in one hour.