if im plotting a graph:

Time Squared vs Length

What will be the unit of my gradient ?

3 answers

If time is on X axis and distance on Y axis then units will be m/sec^2.
what about time on y and length on x ?
That will be sec^2 per m but that is most unlikely to be required as generally time is taken as independent variable and variations are measured per unit time i.e. time rate of variation.