Which of these make sense?

1. I solved this function.
2. I solved this equation.
3. I graphed this function.
4. I graphed this equation.
5. x=5 is a root of (solution to) the function f(x).
6. x=5 is a root of (solution to) the equation x+1=6.
7. The point (2,3) is in (belongs to/satisfies) the function f(x)=x+1.
8. The point (2,3) is on (belongs to/satisfies) the graph of f(x)=x+1.
9. The point (2,3) is on (belongs to/satisfies) the equation y=x+1.
10. The pair (2,3) is in (belongs to/satisfies) the function f(x)=x+1.
11. The pair (2,3) is on (belongs to/satisfies) the graph of f(x)=x+1.
12. The pair (2,3) is on (belongs to/satisfies) the equation y=x+1.
    
13. A solution to a function is any number that makes the function true.
14. A solution to an equation is any number that makes the equation true.
15. To find a root of a function, you have to solve an equation.
16. To find a root of an equation, you have to solve a function.
17. Not every equation can be solved.
18. Not every equation has solutions.

• True or false? Statements 17 and 18 mean the same thing.