In a case of one dimensional heat conduction in a medium

In a case of one dimensional heat conduction in a medium with constant properties, T is the temperature at position x, at time t.
Then δT is proportional to
δt

One dimensional heat conduction equation is,

	δ²T	=	1		δT
	δx²		α		δt

∴	δ²T	∝	δT
	δx²		δt

Then	δT	is proportional to
	δt