joejoew90ovlynk joejoew90ovlynk
  • 01-11-2017
  • Mathematics
contestada

What is the equation of the line graphed?

A)
y = 3x


B)
y = 3x - 2


C)
y = -3x - 2


D)
y = -3x + 2

What is the equation of the line graphed A y 3x B y 3x 2 C y 3x 2 D y 3x 2 class=

Respuesta :

chi3fcomm5nd
chi3fcomm5nd chi3fcomm5nd
  • 01-11-2017
to find the equation you need any two points on the line
let us pick (0,-2) and (1,1)
we can find the slope
[tex]m = slope = \frac{ - 2 - 1}{0 - 1} = \frac{ - 3}{ - 1} = 3[/tex]
using the point-slope equation
(y-y1)=m(x-x1) so choosing either of the points i will pick (1,1)
y-1=3(x-1)
y-1=3x-3
y=3x-2 which is b
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