I have a value and if that value is 1 the answer is 125,
but if that value is .7 the answer is 325,
how do I make the formula that calculates the points in-between? (f. example .75 or .91)
+130511 Well, we could write a linear equation for this...... Note, there might be other possibilties, as well.
Calling the two data points (1, 125) and (.7, 325), the "slope" of this line is
(325 - 125) / (.7 - 1) = (200) / (-.3) = -2000/3
So the equation becomes
y - 125 = (-2000/3) (x -1)
y = (-2000/3)x +(2000/3) + 125
y = (-2000/3)x + (2375/3)
And that's it ... 
+130511 Well, we could write a linear equation for this...... Note, there might be other possibilties, as well.
Calling the two data points (1, 125) and (.7, 325), the "slope" of this line is
(325 - 125) / (.7 - 1) = (200) / (-.3) = -2000/3
So the equation becomes
y - 125 = (-2000/3) (x -1)
y = (-2000/3)x +(2000/3) + 125
y = (-2000/3)x + (2375/3)
And that's it ...
