brookededominicis
brookededominicis brookededominicis
  • 15-11-2021
  • Mathematics
contestada

What is the equation of this line?
a. y=2x-3
b. y=-1/2x-3
c. y=-2x-3
d. y=1/2x-3

What is the equation of this line a y2x3 b y12x3 c y2x3 d y12x3 class=

Respuesta :

jimrgrant1 jimrgrant1
  • 15-11-2021

Answer:

a

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (0, - 3) and (x₂, y₂ ) = (2, 1) ← 2 points on the line

m = [tex]\frac{1-(-3)}{2-0}[/tex] = [tex]\frac{1+3}{2}[/tex] = [tex]\frac{4}{2}[/tex] = 2

The line crosses the y- axis at (0, - 3 ) ⇒ c = - 3

y = 2x - 3 ← equation of line

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