Slopes and indices

steverpi75

New Member
Joined
Mar 23, 2006
Messages
14
Hello,

I'm trying to build an "index" system. Basically, the indicator would get full points, 0.02 pts, for being greater than or equal to 95; max of 100. As you fall lower than 95 to a minimum of 85, 0.00 pts, you lose points linearly. I tried making a slope equation but I can't get past the 95-100 part.

This is what I made so far, but it isn't correct.:
y=(0.02-0.00/95-85)x + 0

where X is 0 - 100

Thanks for the help.
 

Excel Facts

Which came first: VisiCalc or Lotus 1-2-3?
Dan Bricklin and Bob Frankston debuted VisiCalc in 1979 as a Visible Calculator. Lotus 1-2-3 debuted in the early 1980's, from Mitch Kapor.
Hi steverpi75

You say "where X is 0 - 100" but you don't talk about the range 0-85.

What I understood:

[95-100], y=0.02

[85-95[, y=(x-85)/500 (up linearly from x=85 to 95, y=0 to 0.02)

[0-85[, you forgot to specify

The formula is, assuming x in A1

=IF(A1>=95,0.02,IF(A1>=85,(A1-85)/500,"Not specified"))

Hope this helps
PGC
 
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