Question

Please help and thank you

Answer 1

Answer:

C

Step-by-step explanation:

$m=\frac{y_2-y_1}{x_2-x_1} \\ \\ y_2-y_1=m(x_2-x_1) \\ \\ -y_1=-y_2+m(x_2-x_1) \\ \\ y_1=y_2-m(x_2-x_1)$

Answer 2

Answer:

C

Step-by-step explanation:

Given

m = $\frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }$ ( 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