Open Up - Grade 8 - Mathematics - Unit 3 - Lesson 9 - Formative Library | Library

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Suppose that during its flight, the elevation (in feet) of a certain airplane and its time , in minutes since takeoff, are related by a linear equation. Consider the graph of this equation, with time represented on the horizontal axis and elevation on the vertical axis. For each situation, decide if the slope is positive, zero, or negative.

Draggable item		Corresponding Item
The plane is ascending at a rate of 2000 feet per minute.		The Slope Is Zero
The plane is cruising at an altitude of 37,000 feet above sea level.		The Slope Is Negative
The plane is descending at rate of 1000 feet per minute.		The Slope Is Positive

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