How to determine the length of a line given its endpoints?

Question

My line has the endpoints (0,0) and (-7, 6). I graphed it so I know it is a line. However, when I went to plug it into the distance formula, the answer on my calculator was undefined. I'm not sure what do do from here.

Answer 1

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Answer 2

line from (0,0), the origin, to the point (-7,6) has distance

= sqr((-7)^2 + 6^2) = sqr(49+36) = sqr85 = about 9.219544457

= about 9.22

construct a right triangle with hypotenuse = the distance between the points with sides = 7 and 6