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# what is d in gradient function Watch

1. so i know the gradient function is dy/dx but what does "d" mean, i know it's "differentiate" and "with respect to" but why "d" not any other letter? is it by any chance because capital delta means "change in" and delta's like the greek equivalent of d
2. (Original post by Toasticide)
so i know the gradient function is dy/dx but what does "d" mean, i know it's "differentiate" and "with respect to" but why "d" not any other letter? is it by any chance because capital delta means "change in" and delta's like the greek equivalent of d
Difference in y co-ords/ difference in x co-ords
3. Yes. Delta in mathematical terms stands for the "difference in or between".

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