Population of the United States 170 Male Female 162 160 157 157 151 152 147 143 150 138 134 140 130 127 129 122 121 120-116 110 100 1985 1990 1995 2000 2005 2010 2014 Year Population (millions) Male U.S. population, M(x), in millions, x years after 1985 M(x) = 1.48x + 115.1 Female U.S. population, F(x), in millions, F(x) = 1.44x + 120.9 x years after 1985
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
The bar graph shows the population of the United States, in millions, for seven selected years.
a. Write a function that models the total U.S. population for the years shown in the bar graph.
b. Use the function from part (a) to find the total U.S. population in 2010.
c. How well does the result in part (b) model the actual total U.S. population in 2010 shown by the bar graph?
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