AlgebraEasySum of coordinates where two lines cross
Algebra practice question
In the xy-plane, the horizontal line y = 2 and the vertical line x = 5 cross at one point. What is the sum of the coordinates of that point?
Answer: 7
The point is (5, 2); 5 + 2 = 7.
Common wrong answers
- If you answered 2
- 2 is the y-coordinate alone.
- If you answered 3
- 3 subtracts instead of adding.
- If you answered 10
- 10 multiplies the coordinates.
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