Solution :
Transforming given equations :
From above equations we can see that equation 1) has largest percentage growth rate and the percent growth rate is 12% .
Hence, this is the required solution.
Y=kx
12=-4k
k = -3
so when y = 15
y = kx
15 = -3x
x = -5
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$50 / 0.04 = $1250 (4% interest)
so
1250 * 0.06 = $75
answer
interest $75 at 6%
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y = kx
1/4 = 4k
k = 1/16
when x = 5
y = kx
y = 1/16(5)
y = 5/16
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y = kx
-5 = 4k
k = -5/4
direct equation
y = -5/4x
You could just subtract it or you could make it into a plus negative