Question

(7, 7) and (-3, 7) are on the line,

Answer 1

Answer: y=7

Explanation:

(7,7) and (-3,7) are on the line

`\boxed {(x-x_1)/(x_2-x_1)=(y-y_1)/(y_2-y_1) }`

x₁=7 x₂=-3 y₁=7 y₂=7

Hence,

`\displaystyle\\(x-7)/(-3-7) =(y-7)/(7-7) \\\\(x-7)/(-10) =(y-7)/(0) \\\\(x-7)(0)=(y-7)(-10)\\\\0=-10y+70\\\\0+10y=-10y+70+10y\\\\10y=70`

Divide both parts of the equation by 10:

`y=7`