olve each of the following equations for r. Determine the exact value for r and a decimal approximation correct to pur decimals places. 1. 8" – 15 = 0 (Solving this equation will locate the r-intercept on the graph of y = 8 – 15.) 2. log(x + 6) = log(3r – 2) + 2 (Solving this equation will determine the r-coordinate of the point of intersection of the functions y = log(x + 6) and y = log(3r – 2) + 2.) = 2000 (1+ 2045 (Solving this equation will determine the amount of time it takes an investment $2000 to grow to $4400 if interest is 4.5% compounded monthly.) 3. 4400

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.