Honors Algebra DAY 1 EXPONENTIAL GROWTH & DECAY GRAPHS

CONCEPT

EXAMPLE 1 xy x y

CONCEPT

EXAMPLE 3B – YOU TRY xy x y

EXAMPLE 1 xy x y

EXAMPLE 4 xy x y

EXAMPLE 5 xy x y

ALGEBRA (Day 2) Applications of Exponential Graphs

FORMULA

In 2006, there were 1,020,000,000 people worldwide using the Internet. At that time, the number of users was growing by 19.5% annually. Write a model to estimate the number of people using the Internet in the year EXAMPLE 1

In 2006, there were about 2,000,000,000 people worldwide using cellular phones. At that time, the number of users was growing by 11% annually. Write a model to estimate the number of people using cell phones in the year EXAMPLE 2

FORMULA

The pressure of the atmosphere is 14.7 lb/in 2 at Earth’s surface. It decreases by about 20% for each mile of altitude up to about 50 miles. Estimate the atmospheric pressure for an altitude of 24 miles. EXAMPLE 3

The pressure of a car tire with a bent rim is 34.7 lb/in 2 at the start of a road trip. It decreases by about 3% for each mile driven due to a leaky seal. Estimate the air pressure of the tire after 15 miles. EXAMPLE 4