Question 245206
You are running in a marathon. 
You either run 8 miles per hour or walk 4 miles per hour. 
Write an equation to show the relationship between time 
ran and time walked during the 26.2 mile course and then 
graph the equation.
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Run DATA:
rate = 8 mph ; time = r hrs. ; distance = 8r miles
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Walk DATA:
rate = 4 mph ; time = w hrs ; distance = 4w miles
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Equation:
distance + distance = 26.2 miles
4w + 8r = 26.2
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Graphable equation:
w = -2r + 6.55
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{{{graph(400,300,-10,15,-10,15,-2x+6.55)}}}
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Cheers,
Stan H.