choycecoppin48 choycecoppin48
  • 21-01-2021
  • Mathematics
contestada

(3, -5)(0, 4)
Write the equation of a line using the point slope formula

Respuesta :

jimrgrant1 jimrgrant1
  • 21-01-2021

Answer:

y = - 3x + 4

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 ) = (3, - 5) and (x₂, y₂ ) = (0, 4)

m = [tex]\frac{4-(-5)}{0-3}[/tex] = [tex]\frac{4+5}{-3}[/tex] = [tex]\frac{9}{-3}[/tex] = - 3

The line crosses the y- axis at (0, 4) ⇒ c = 4

y = - 3x + 4 ← equation of line

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