Question

Which two pairs of coordinates represent a line with a negative slope?


(1, 2) and (2,0)

(2, 3) and (4, 10)

(5, 9) and (5, 8)

Answer 1

we know the slope a=y1-y2/x2-x1

Answer 2

yes

Answer 3

so try the first one replace in the equ i told you about and sorry in the denominator it x1-x2 sorry

Answer 4

youll get 2-0/1-2 which is -2 which is a negative slope so its A :)

Answer 5

oohhh i get it. so i have to calculate all the slopes and then pick which one is the negative one out of them?

Answer 6

@joyraheb

Answer 7

of course and obviously mentally you could directly know if the value is negative or positive