Question

A equação de reta que passa pelos pontos (2,8) e (3,10) é:

A)y=2x+5
B)y=3x+4
C)y=2x+4
D)y=5x+2
E)y=2x+3

Answer 1

A(2,8) e B(3,10)

M = ( yb - ya ) / ( xb - xa ) = ( 10 - 8 ) / ( 3 - 2 ) = 2/1 = 2

y - ya = m ( x - xa )

y - 8 = 2 ( x - 2 )

y - 8 = 2x - 4

y = 2x - 4 + 8

y = 2x + 4