Bob is taking his son to look at a college 150 miles from their home. In the first hour they drive at a rate of 60 mph. If they want to reach their destination in 2 Â― hours, what speed must they average the last 1 1/2 hours?
60 miles per hour
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10
Is this a proportional relationship? Why or why not? If so, find the constant of proportionality and write an equation.
No, the line does not go through the origin so the ratios are not equivalent.
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10
How can I tell if a graph is proportional?
It will be a line through the origin.
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10
An airplane flies 105 miles in Â― hour. How far can it fly in 1 ž hours at the same rate of speed?
262.5 miles
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10
Is this a proportional relationship? If so, find the constant of proportionality and write an equation.
Yes, the constant of proportionality is 5. y=5x
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10
Is this a proportional relationship? If so, find the constant of proportionality and write an equation.
Yes, the constant of proportionality is 7. y=7x
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10
Benito saves $6 out of every $20 he earns. He earned $90 one month. How much did he save?
$27
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10
How can I tell if an equation is proportional?
It will be in the form y=kx where k is the constant of proportionality.
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10
You jog 3.6 miles in 30 minutes. At that rate, how far will you run in 20 minutes?
2.4 miles
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10
You earn $33 in 8 hours. At that rate, how much would you earn in 5 hours?
$20.63 (20.625)
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10
How can I tell if a table is proportional?
It will have the same multiplier for every pair of values. (constant of proportionality)