You are mowing lawns to make some extra money. The amount of money you make vari


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 You are mowing lawns to make some extra money. The amount of money you make varies directly with the number of lawns you mow. If you mow 5 lawns and earn $50, what is the constant of variation?
 
a45
b1/10
c1/45
d10

19
What is the domain of the relation?
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a{–2, –1, 0, 1, 2}
b{(0, –1), (1, –2), (1, 0), (1, 2), (2, 1)}
c{0, 1, 2}
d{A, B, C, D, E}


May 11th, 2015

Let x be the number of lawns you mow and y be the amount of money you earn for it. Then y = kx, where k is the variation constant. For x = 5 we get y = 50, that is, 50 = 5k and k = 10. 

The answer is c).

19. The domain of the relation is the set of all values of the x-coordinates of the points A, B, C, D, and E. There are only three such values: 0, 1, and 2.

The answer is c).

May 11th, 2015

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