Joey deposited $50 in a savings account earning 5% interest, compounded annually.
What is the equation?
y = 50(1.05)x
The population of Winnemucca, Nevada, can be modeled by P=6191(1.04)t where t is the number of years since 1990.
What is the growth factor of this equation? (written as a percent)
4%
Write a function to describe the situation.
You drink a beverage with 120 mg of caffeine. Each hour, the caffeine in your system decreases by about 12%.
y = 120 (0.88)x
What is
growth y =4* 2x
decay y =12 (1/3)x
Neither
Since 2005, the amount of money spent at restaurants in the United States has increased about 7% each year. In 2005, about $360 billion was spent at restaurants.
Write the equation with x representing years and y representing money in billions. AND predict the annual spending in 2015.
y = 360(1.07)x
x = 10, y = 708 billion