Question

Tentukan persamaan garis yang bergradien 3 dan melalui titik berikut!
a. (5,9)
b.(4,-7)
c. (-6,12)
d. (-7,-10)

Answer 1

@ Y - Y1 = m(X - X1)
=> Y - 9 = 3(X - 5)
=> Y - 9 = 3X - 15
=> 3X - Y - 6 = 0

@ Y - Y1 = m(X - X1)
=> Y - 4 = 3(X -(-7))
=> Y - 4 = 3(X + 7)
=> Y - 5 = 3X + 21
=> 3X - Y + 26 = 0

@ Y - Y1 = m(X - X1)
=> Y + 6 = 3(X - 12)
=> Y + 6 = 3X - 36
=> 3X - Y - 42 = 0

@ Y - Y1 = m(X - X1)
=> Y + 7 = 3(X + 10)
=> Y + 7 = 3X + 30
=> 3X - Y + 23 = 0