Let f be a differentiable function on (2,5) with f′(x)>0 for every x in that interval. Which of the following statements is correct?
a) f(2.3)>f(4.7)
b) f(2.3)≥f(4.7)
c) f(2.3)<f(4.7)
d) The relation between f(2.3) \text{ and } f(4.7) \text{ cannot be determined}