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.
Estimating time Suppose you want to travel D miles at a constant
speed of (60 + x) mi/hr, where x could be positive or negative. The
time in minutes required to travel D miles is T(x) = 60 D(60 + x)-1.
Use the result of the given problem to approximate the amount of time
it takes to drive 93 miles at 63 mi/hr. What is the exact time required?
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