[Chapter 2] A plane is 750 m in the air flying parallel to the ground at a speed of 100 m/s and is initially 2.5 km away from a radar station. At what rate is the distance between the plane and the radar station changing (a) initially and (b) 30 seconds after it passes over the radar station? See the sketch to the right to help visualize the problem. Plane Find Rate This Distance Changing Radar Station 750 m 2.5 km

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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.