SOLUTION: What is the distance formula between EF with endpoints E (-8,1) and F (1,1)

Question 983524: What is the distance formula between EF with endpoints E (-8,1) and F (1,1)
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Distance from any point (u,v) and (r,w) is .

The final finished answer for your two given points, is 9.
Answer by ikleyn(52780) (Show Source): You can put this solution on YOUR website!

First, compute the vector EF (with the start-point E and the end-point F) in the coordinate form

EF = (1 - (-8), 1 - 1) = (9, 0).

In other words, x-component dx = 1 - (-8) = 9 and y-component dy = 1 - 1 = 0.

Now, the length of the vector EF is

= = = 9.

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