# Pre-Calculus: Rational Functions Help

This page is for pre-calculus students who need help, and for teachers and tutors who are looking for resources on rational functions.

# Pre-Calculus: Rational Functions

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Do you need help with Evaluating Rational Functions in your Pre-Calculus class?

# Pre-Calculus: Rational Functions Videos

Evaluating Rational Functions
Video Clip Length: 1 minute 26 seconds
Video Clip Views: 11703

functions, number sense, numbers, rational functions, rational numbers
Evaluating Rational Functions
Video Clip Length: 1 minute 28 seconds
Video Clip Views: 11641

functions, number sense, numbers, rational functions
Evaluating Rational Functions 2
Video Clip Length: 1 minute 40 seconds
Video Clip Views: 10400

functions, number sense, numbers, rational functions

# Pre-Calculus: Rational Functions Word Problems

A driver averaged 50 miles per hour
A driver averaged 50 miles per hour on the round trip between Baltimore and Philadelphia, 100 miles away.  The average speeds for going and returning were x and y miles per hour, respectively. Show that
y=25x/(x-25)
A grade school is taking a trip
A grade school is taking a trip to the zoo. A parent group of 6 people is responsible for putting together 225 box lunches for the trip. The group hopes to recruit extra people for the task. Write an equation that gives the average number "n" of box lunches made per person as a function of the number "p" of parents that can come in and help complete the task. Then graph the ...
Boyle`s Law, applied to the amount of gas
Boyle's Law, applied to the amount of gas used in a given experiment at a constant temperature, states that pV = 240 where p is pressure measured in kilopascals and V is volume measured in cubic centimeters.  If a decrease in pressure of 1 kPa produces an increase in volume of 20 cm^3...