Question

Which of the following equations represents a line that passes through the points (5,3) and (-5,-1). Both, neither, 1, or 2.

1. y+1=2/5(x+5)
2. y=-2/5x+1
PLS ANSWER

Answer 1

Both

Explanation:

(5, 3) and (-5, -1)

To get the equation of two points(coordinate)

(y₂ - y₁)/(x₂ - x₁) = (y - y₁)/(x - x₁)

(5, 3) --- (x₁, y₁)

(-5, - 1) --- (x₂, y₂)

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

-4/-10 = (y - 3)/(x - 5)

4/10 = (y - 3)/(x - 5)

⅖ = (y - 3)/(x - 5)

5(y - 3) = 2(x - 5)

5y - 15 = 2x - 10

5y = 2x - 10 + 15

5y = 2x + 5

Divide through by 5

5y/5 = 2x/5 + 5/5

y = ⅖x + 1

Option 2 is correct

let's see if option 1 is correct

y = ⅖x + 1

add 1 to both sides.

y + 1 = ⅖x + 1 + 1

y + 1 = ⅖x + 2

y + 1 = ⅖(x + 5)

So, option 1 is also correct

Answer 2

Both

Explanation:

(5, 3) and (-5, -1)

To get the equation of two points(coordinate)

(y₂ - y₁)/(x₂ - x₁) = (y - y₁)/(x - x₁)

(5, 3) --- (x₁, y₁)

(-5, - 1) --- (x₂, y₂)

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

-4/-10 = (y - 3)/(x - 5)

4/10 = (y - 3)/(x - 5)

⅖ = (y - 3)/(x - 5)

5(y - 3) = 2(x - 5)

5y - 15 = 2x - 10

5y = 2x - 10 + 15

5y = 2x + 5

Divide through by 5

5y/5 = 2x/5 + 5/5

y = ⅖x + 1

Option 2 is correct

let's see if option 1 is correct

y = ⅖x + 1

add 1 to both sides.

y + 1 = ⅖x + 1 + 1

y + 1 = ⅖x + 2

y + 1 = ⅖(x + 5)

So, option 1 is also correct