word question in algebra

oh i think i see instead of ft/miles because i changed the 13 miles to ft it would be 0.61 ft/ft


An airplane covered 13 miles of its route while decreasing its altitude by 42,000 feet. Find the slope of the airplane's line of descent. Round to the nearest hundredth. [Hint: 1 mi = 5280 feet.]


the formula i would use for this would be the slope formula
y=mx+b
would it be
y=68,640x+42,000


If you want altitude (y) in feet, and distance in miles, then

slope= -42000/13 ft/mile

The hint indicates someone wants slope in ft/ft, or - 42000/(12*5280) ft /ft



Actually, the units for slope should have been specified. In the real world, equations dealing with physical things have units. There is a big difference in quarts and liters, and so forth. Units change the values in equations considerably.

slope=-42000/68640
slope=-0.611
nearest hundred
slope=-0.61
am this correct

You missed my point. Yes, in ft/ft

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asked by carla

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