Question

if the slope of a line is negative. does that mean the change in x is negative or the change in y??

Answer 1

change in y

Answer 2

why?

Answer 3

Slope is defined by conventoin as rate of change of y wrt x

Answer 4

huh?

Answer 5

positive slope implies y increases as x increases
negative slope implies y decreases as x increases

Answer 6

you can say it like that, but it's possible that x increases and slope is zero

Answer 7

yes - that is different case:
zero slope means y remains the same as x increases

Answer 8

that is one possibility

Answer 9

what do you mean by y increasing and x decreasing?

Answer 10

I used your language :D

Answer 11

if you look at this line, the slope is negative. it could be calculated by either working out the changes from A to B OR by working out the changes from B to A.
so, from A to B we get:\[slope=\frac{1-5}{5-1}=\frac{-4}{4}=-1\]
and from B to A we get:\[slope=\frac{5-1}{1-5}=\frac{4}{-4}=-1\]