Freezing Point Depression Equation in Calculus Notation?

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Homework Statement

How do I write it in calculus notation?
Delta T = i k m

were
Delta T = Change of temperature
i = van't Hoff value
m = concentration in molality
k = molal freezing/boiling point constant for the solvent

THANKS!

Homework Equations

The Attempt at a Solution

 

[Mark44]

Is this what you're looking for?
$$\Delta T = i~m~k$$

The LaTeX for this is [ tex]\Delta T = i~m~k[ /tex] (without the extra spaces in the tex tags.