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Given two points in a Cartesian coordinate system, find the x-value, where polynomial of 1. order (y = m*x+c) is equal to a given value c.

e.g.: we have the points P1(1,2) and P2(3,6) and we want wo know at which x-value y is equal to c = 8; The input is: x = [1 3], y = [2,6], c = 8.

The answer is 4.

Consider the possibility that there isn't any solution (return NaN) of that there is an infinity amount of points (return Inf). Additionally consider that the point could represent a vertial line.

Good Luck!

17 correct solutions
23 incorrect solutions

Last solution submitted on Jan 26, 2015

1 Comment

Carlos Adrian Vargas Aguilera
on 30 Jun 2013

I don't like my solution. I rader prefer David's. JEJE

3 Comments