Rubie
Input: 0 1 2 3
Output: 5.5 4.2 3.2 2.2
What's the relationship ?
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Rubie
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@AccessDenied can u help me please ?
ASAAD123
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when Input increase, output will decrease.
nubeer
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ya seems like linearly decreasing.
cinar
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it is not linear..
ASAAD123
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output=-1.3(input)+5.5
ASAAD123
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linear decreasing
ASAAD123
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yes
nubeer
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@cinar it looks linear decreasing , if one value is a lil diff doesnt mean its not linear.
ASAAD123
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no for first two values
Skaematik
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There is no formula available.
It is not an arithmetric progression because the distance between values is not constant
It is not a geometric progression between the ratio of consecutive values is not constant
cinar
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y=-0.05x^3+0.3x^2-1.55x+5.5
nubeer
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it's a smiple question .. why making so much complicated.
nubeer
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why .. doesn't it look linear?
cinar
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assume that f(x)=ax^3+bx^2+cx+d
f(0)=5.5=d
f(1)=a+b+c+5.5=4.2
f(2)=8a+4b+2c+5.5=3.2
f(3)=27a+9b+3c+5.5=2.2
cinar
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a+b+c=-1.3
8a+4b+2c=-2.3
27a+9b+3c=-3.3
after solve this eq. system you'll get a,b,c coeff.
cinar
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