Mathematic crossword

2. out of a group of numbers, what do they all have in common?
6. the point where the graph crosses over the Y axis
7. This years form of math, but not quite the hardest
8. a letter within an algebra problem
11. A line through a shape so that each side is a mirror image.
15. An equation where the highest exponent of the variable (usually "x") is a square (2).
18. the point where the graph crosses over the X axis
19. That's the sum of it!

1. a special relationship between values: Each of its input values gives back exactly one output value.
3. an expression that has a square root,cube root ETC.
4. It makes the difference
5. When the graph is moved a few spaces Vertically
8. A point where two or more straight lines meet. A corner.
9. Only one of the same may remain
10. When the graph is moved a few spaces horizontally
12. a number that if multiplied by itself, it wields another whole number
13. Another name for an equation
14. X=b+/- the square root of b^2-4(a)(c) over 2(a)
16. a number placed to the upper right hand corner of a number to show how many times you multiply that number by itself
17. When you have gone through a problem, and when checking your answer shows that there is no answer