A civil engineer is drawing a plan for the location and length of a new underground sewer pipe on the coordinate grid. The pipe on the plane will run from point n(a,-2) to point p(1,b) on the coordinate grid. Which expression represents the shortest distance between n and p in units?.



Answer :

The shortest distance between n(a, -2) and p(1,b) can be expressed by √( (1 - a)² + (b + 2)² ) units.

Distance between two point on a plane is the length of the line segment connecting the two points. The formula to determine distance between two points, say (x₁, y₁) and (x₂, y₂) is

Distance, d = √( (x₂ - x₁)² + (y₂ - y₁)² )

Therefore in this case where the points are n(a, -2) and p(1,b), the distance between n and p is

d = √( (1 - a)² + (b - (-2))² ) units

d = √( (1 - a)² + (b + 2)² ) units

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