ing Real World Relat Purpose: To use the concepts developed in Precalculus to model an actual make a prediction. In this case we will model global warming The data: The following table summarizes the average yearly temperature (F")and carbon dioxide 2005 Year 096 1965 S661 45.86 0007 46.23 Temperature 44.45 0661 47.53 45.53 emissions in parts per million (ppm) measured at Mauna Loa, Hawaii 1970 1975 1980 1985 CO2 379.7 43.29 369.4 43.61 320.0 325.7 331.1 45.71 99'9t 345.9 316.9 43.35 360.6 Emissions 354.2 338.7 Defining our variables: t = years after 1960, T = Temperature, and C = CO2 emissions. We will use the data from the years 1960 and 1990 for our models. Describe the Relationship That is, for t = 0, T = 44.45 and C = 316.9 while for t = 30, T = 45.53 and C = 354.2 dels the orature data Tre 2) Modeling CO2 emissions a) Use the data from 1960 and 1990 to find a linear function that models the CO2 emissions b) Use your linear function to predict the CO2 emissions in 2005. Compare your prediction with the actual CO2 emissions in 2005. omirrions data from 1960 throIueh 2005.

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Percentage

A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.

Algebraic Expressions

In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.

Numbers

Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.

Subtraction

Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.

Addition

Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.