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.
 

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pgc01

MrExcel MVP
Joined
Apr 25, 2006
Messages
19,887
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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