johnsonsavannah69 johnsonsavannah69
  • 11-05-2017
  • Mathematics
contestada

Which equation is a point slope form of the equation of this line? (-2,1). (1,7)

A. -2x+y+5=0
B. Y=2x-5
C. (Y+1)=-1/2(x-2)
D. (Y-1)=2(x+2)

Respuesta :

ghanami
ghanami ghanami
  • 14-05-2017
hello : 
answer : D. (Y-1)=2(x+2)
because : 
if x=1  ... y =7
if : x= -2   .... y= 1 
the slope is :    (1-7)/(-2-1) = -6/-3=2
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