Question

a equação da reta com coeficiente angular igual a  e  que passa pelo ponto P (2,-5) é:
a) 4x + 5y + 12 = 0
b) 4x + 5y + 14 = 0
c) 4x + 5y + 17 = 0
d) 4x + 5y + 16 = 0
e) 4x + 5y + 15 = 0

Answer 1

 P (2,-5)
a) 4x + 5y + 12 = 0 ==>  4.2+ 5(-5) + 12 = 0 ==> 8-25+12 =0 ==> - 5 = 0
b) 4x + 5y + 14 = 0 ==>  4.2+ 5(-5) + 14 = 0 ==> 8-25+14 =0 ==> - 3 = 0
c) 4x + 5y + 17 = 0 ==>  4.2+ 5(-5) + 17 = 0 ==> 8-25+17 =0 ==>   0  = 0
d) 4x + 5y + 16 = 0 ==>  4.2+ 5(-5) + 16 = 0 ==> 8-25+16 =0 ==> - 1 = 0
e) 4x + 5y + 15 = 0 ==>  4.2+ 5(-5) + 12 = 0 ==> 8-25+15 =0 ==> - 2 = 0

letra C