Question

Please help and thank you

Answer 1

C

Explanation:

Given

m =
`(y_(2)-y_(1)  )/(x_(2)-x_(1)  )` ( cross- multiply )

y₂ - y₁ = m(x₂ - x₁) ( subtract y₂ from both sides )

- y₁ = m(x₂ - x₁) - y₂

Multiply through by - 1

y₁ = - m(x₂ - x₁ ) + y₂, thus

y₁ = y₂ - m(x₂ - x₁ ) → C

Answer 2

C

Explanation:

`m=(y_2-y_1)/(x_2-x_1) \\ \\ y_2-y_1=m(x_2-x_1) \\ \\ -y_1=-y_2+m(x_2-x_1) \\ \\ y_1=y_2-m(x_2-x_1)`