Question

Kemiringan garis yang melalui titik (4, h) dan (h + 3, 7) kemiringan -1/4. tentukan nilai h<br />
buat besok!!!

Answer 1

(4, h) --> (x1, y1)
(h + 3, 7) --> (x2, y2)

m = -1/4
(y2 - y1)/(x2 - x1) = -1/4
(7 - h)/(h + 3 - 4) = -1/4
(7 - h)/(h - 1) = -1/4
4(7 - h) = (-1)(h - 1)
28 - 4h = -h + 1
28 - 1 = -h + 4h
27 = 3h
h = 27 : 3
h = 9