Rate of Change Practice Questions
Remember your formula r=∆(x)
∆t
Where (x) represents the variable that you
have chosen!
Don’t forget to show your work and create a sentence.
1) Kevin's savings account balance changed from $1140 in January to $1450 in April. Find the
average rate of change per month. Round your answer to the nearest dollar.
2) At 7:00 pm the temperature is 72 degrees Fahrenheit. At 10:00 pm it is 52 degrees
Fahrenheit. Find the average rate of change in the temperature.
3) In 1990 the value of a prized collector's coin was $12500. In 2009, the value of the coin is
$20050. What is the annual rate of change? Round to the nearest whole dollar.
4) A scuba diver is 30 feet below the surface of the water 10 seconds after he entered the water
and 100 feet below the surface after 40 seconds. What is the scuba divers rate of change?
5) A person weighed 145 lbs in 1986 and weighs 190 lbs in 2007. What was the rate of change
in weight?
6) After 30 baseball games, A-Rod had 25 hits. If after 100 games he had 80 hits, what is his
average hits per baseball game.