Write an equation for a line parallel to: Y = 1/2x + 4 that goes through the point (3,5)
A) y - 5 = 1/2 (x - 3)
B) y - 5 = -2 (x - 3)
C) y - 3 = -2 (x - 5)
D) y - 3 = 1/2 (x - 5)

Respuesta :

Answer:

The equation of a line passing through the point (3 , 5) and parallel to Y = 1/2x + 4 is

A) y - 5 = 1/2 (x - 3)

Step-by-step explanation:

Given:

equation of line

[tex]y=\frac{1}{2}x + 4[/tex]

To Find:

The equation of a line passing through the point (3 , 5) and parallel to Y = 1/2x + 4

Solution:

Let  A be the point A (x₁ ,y₁ ) ≡ (3  , 5)

on the required equation of a line.

As the required line is parallel slope of the line are equal.

On comparing the [tex]y=\frac{1}{2}x + 4[/tex]

equation with

[tex]y=mx +c[/tex]

slope =m =[tex]\frac{1}{2}[/tex]

∴ slope of the required line is also m =[tex]\frac{1}{2}[/tex]

as lines parallel.

We know that equation of line having slope m and passing through point (x₁ ,y₁ )is given by

[tex](y-y_{1})= m(x-x_{1})[/tex]

so on substituting the above values i.e m=[tex]\frac{1}{2}[/tex] and A (x₁ ,y₁ ) ≡ (3  , 5)

we get

[tex]y-5=\frac{1}{2}(x-3)[/tex]

∴ [tex]y-5=\frac{1}{2}(x-3)[/tex] as per required