Give at least 3 real life examples of direct and increase proportion. What events in life that we encounter them?
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Racewalkers in Helsinki, Finland
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Direct proportionalities from daily life
Direct proportions play a big role in our everyday lives. Here we look at a spectrum of illustrative examples.
In this step you will learn about
the key definitions for direct proportionality
direct proportions arising in situations involving speed, money, fuel efficiency of your car, and the role of ππ.
What is a direct proportionality?
If xx and yy are two variable quantities that satisfy the relation
y=kxy=kx
for some fixed number kk, then we say that yy is directly proportional to x.x. The number kk is called the constant of proportionality. One important way of thinking about this constant kk is that it tells us how much yy increases by if we increase xx by exactly 11.
We will write
y∝xy∝x
to express that yy is directly proportional to xx. Note that this symbol however loses an important piece of information: the exact value of the constant of proportionality.
Answer:
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