tober 2 2013,$20 U.S, could be exchanged for 15.6 Euros. any Euros do you think

Question

tober 2 2013,$20 U.S, could be exchanged for 15.6 Euros. any Euros do you think you would receive in exchange for SO U.S.? (b) Would you say that y mx+b or y - mx would be an appropriate form for an equation that s the number of Euros based on the number of us dollars? Explain your reasoning. give (c) Determine the equation that gives the number of Euros based on the number of US dollars. (d) Use your equation and a calculator to complete the table. US dollars 20 40 60 80 100 Euros 15.60 se your equation to determine the number of Euros that can be exchanged for $500 u.s. dollars.

Explanation / Answer

Answer

a,b,c. For zero money provided, we won't get any money back which is quite obvious. Hence, for 0 Euros, we will get an amount of 0 dollars as pay back.

Now,

in equation, y=mx+b,

we should have y=0 for x=0 where

y= Euros and x = Dollars.

Hence, b=0 and this implies that situation should be of the form y=mx.

Given that, for x=20, we get y=15.60.

Therefore, m = 15.60/20 = 0.78.

Hence, y=0.78x.

d.

e.

For x = 500, we have

y=0.78*500 Euros = 390 Euros.

Euros Dollars 15.60 20 31.2 40 46.80 60 62.4 80 78 100

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