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# 1. An airplane travels

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1. An airplane travels southwest a distance of 800 km at a velocity of 390 km/h. How long does the trip take in hours?

2. Which of the graph lines corresponds to the relation y=k/x where k is a constant?

i think its A

3. Which equation represents direct proportionality?

y=mx

y=mx2+b for nonzero b

y=m/x

y=mx2

i think its y=mx

Dec 10, 2019

#1
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Remember :  Rate x time = distance     re -arrange as     Time = distance/ Rate

Time =  800 km / 390 km/hr =   you can do this part !

2.  If k is constant .....then as 'x' gets larger the value gets smaller (because 'x' is in the denominator)

SO....which do YOU think it is ?

3. y = mx is a direct proportion       y is directly proportional to x    by factor m

Dec 10, 2019
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i got 2.05 hours is that correct?

and then oh okay so then it would be A line as I had circled?

and oh okay awesome i got 3 right!(:

jjennylove  Dec 10, 2019
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Yes....

and yes...

and yes....

ElectricPavlov  Dec 10, 2019
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jjennylove  Dec 10, 2019
edited by jjennylove  Dec 10, 2019
edited by jjennylove  Dec 10, 2019
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i think?

jjennylove  Dec 10, 2019
edited by jjennylove  Dec 10, 2019
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You THINK??  Be a little more confident in your abilities !        Yes, it is "C"

ElectricPavlov  Dec 10, 2019
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your right! I need to be more confident, im alway second guessing and overthink it! thanks!

jjennylove  Dec 11, 2019