LaurenGecko
LaurenGecko LaurenGecko
  • 21-07-2020
  • Mathematics
contestada

Which of the following lines the parallel to the line y-9=7(x+5)

A.) y-9=3x+4
B.) y=-9x-5
C.) y+5=7(x-9)
D.) y-9=5(x+4)

Respuesta :

gmany
gmany gmany
  • 21-07-2020

Answer:

C.) y + 5 = 7(x - 9)

Step-by-step explanation:

Parallel lines have the same slope.

The slope-intercept form of an equation of a line:

y = mx + b

m - slope

b - y-intercept

The point-slope form of an equation of a line:

y - y₁ = m(x - x₁)

(x₁, y₁) - point on a line

m - slope

We have the line y - 9 = 7(x + 5). The slope m = 7.

A) y - 9 = 3x + 4 → m = 3

B) y = -9x - 5 → m = -9

C) y + 5 = 7(x - 9) → m = 7

D) y - 9 = 5(x + 4) → m = 5

The line C) y + 5 = 7(x - 9) has the same slope.

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