Brenna decided to purchase 4 points in order to lower the interest rate on her $175,000 mortgage. How much additional money does
2 answers:
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Y varies directly with x
y = kx
y=14
x=21
14 = 21k
= 
21 and 21 cancels out
= k
The constant of this proportionality is
y = kx
y=14
x=21
14 = 21k
21 and 21 cancels out
The constant of this proportionality is