The slope of the blue curve measures the plane's (altitude, heading, rate of ascent & time in the air) The unit of measurement for the slope of the curve is (miles per hour,degrees, thousand of feet & thousands of feet per minute)

At point A, the slope of the curve is ( 3,000 ,2.5, 3, -10, -10,000, & 2,500), which means that the plane is ( ascending & descending) at a rate of( 3,000 ,2.5, 3, -10, -10,000, & 2,500)feet per minute. (Hint: Calculating the slope, pay extra attention to the units of analysis.)

At point B, the slope of the blue curve is ( -10,000, 8,000,-10,6.67,6,666.67 & 8), which means that the plane is( ascending & descending) at a rate of ( -10,000, 8,000,-10,6.67,6,666.67 & 8feet per minute. (Hint: Calculating the slope, pay extra attention to the units of analysis.)