What does E mean in this format?

Tmp

I'm just playing around with some stuff in excel.

I asked it to create a Polynomial trend line to the order 6 adn it came back wiht this...

Y = -9E-19x⁶ + 2E-14x⁵ - 2E-10x⁴ + 1E-06x³ - 0.0027x² + 3.5222x - 1656.5


I just want to write that as a formula, but what's the E? I've seen it used to represent x10^# before but that dosent seem to fit?

Can someone rewrite that in a format that works in excel?

eg.. = (10^-9)-(19*x^6).....

NobodySpecial

It is 10^x, in this case it means that the coeficients in x^3 and higher are zero.

Tmp

I kind of get what your saying but I still can't see how I can write that as a formula that will work in excel if someone can do it I'm sure I'll be able to make sense of it

NobodySpecial

assuming that x is a cell A1 then you can use E directly in any number

= -9E-19*power(A1,6) + 2E-14*power(A1,5) - 2E-10*power(A1,4) + 1E-06*power(A1,3) - 0.0027*power(A1,2) + 3.5222*A1- 1656.5

Although because the higher terms are so small this is really just

= 0.0027*A1*A1 + 3.5222*A1- 1656.5

HallsofIvy

[QUOTE=Tmp;3081282]I'm just playing around with some stuff in excel.

I asked it to create a Polynomial trend line to the order 6 adn it came back wiht this...

Y = -9E-19x⁶ + 2E-14x⁵ - 2E-10x⁴ + 1E-06x³ - 0.0027x² + 3.5222x - 1656.5

[itex]-9E-19[/itex] is "calculator speak" for [itex]-9 \times 10^{-19}= -0.0000000000000000009[/itex] (18 "0"s and "9" after the decimal point.)

Similarly
[tex]2E-14= 2\times 10^{-14}= .00000000000002[/tex]

[tex]-2 E-10= -2\times 10^{-10}= -.0000000002[/tex]

[tex]1E-06= 10^{-6}= 0.000001[/tex]