Question

What is an equation of the line that passes through the points ((1,8) and (−1,−2)?

Answer 1

Solution:

Let (1,8)=(x1,y1)

(-1,-2)=(x2,y2)

D=?

Now,

D=

`\sqrt{(x2 - x1) ^(2) + (y2 - y1)} ^(2)`

or, D=

`\sqrt{( -1 - 1) ^(2) + ( - 2 - 8) ^(2) }`

`\sqrt{( -2) ^(2) + ( - 10) ^(2) }`

`√(4 + 100 )`

`√(104)`

2
`√(26)`