kweb2017
  • kweb2017
David is rowing a boat upstream. The river is flowing at a speed of 2 miles per hour. David starts rowing at a speed of 6 miles per hour, and his speed decreases at a rate of 1.5 miles per hour. The equation _______ gives the speed of the boat after David has rowed for x hours. y=4+1.5x y=4-1.5x y=6-1.5x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Say the direction David is rowing (upstream) is the positive direction. That makes the direction the river is flowing negative. David rows at 6 mph, but the river is flowing at 2 mph in the opposite direction. That means his "net" speed, relative to an observer on the ground, is 6-2 = 4 mph. He loses 1.5 mph of his speed every hour, so after x hours, his speed is 4-1.5x. Does that make sense?
kweb2017
  • kweb2017
YES THANK YOU <3
anonymous
  • anonymous
Your Welcome!

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