vYou are driving on a straight road that is inclined upward toward the peak of a mountain (see figure). You pass a sign that reads "Elevation 4130 Feet." Three horizontal miles further you pass a sign that reads "Elevation 4960 Feet." (Round your answers to two decimal places.)   (a) Think of the direction in which you are driving as the positive direction. What is the slope of the road? (Note: Units are important here.) ft/mi (b) What is the elevation of the road 5 horizontal miles from the first sign? ft (c) You know that the peak of the mountain is 9,900 feet above sea level. How far in horizontal distance is the first sign from the peak of the mountain? mi

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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.