hey got a question here
posted by David Lee on .
hey if dy/dx= -2 why is it wrong to say that y is alwats decreasing at a rate of -2? I don't really get it.
It is better to say that y is always decreasing with a slope of -2 on a graph of y(x), or at a rate of -2 per change in x. Saying that a rate is a number does not say enough about what variables are involved.