Question 1023126
Some help only:


Problems #1, 16, and 22.
If you expect to solve for just two dimensions, then x=k means all values for y are allowed.  Pick any y value and this will work for x=k.  Similar for a question of y=k; that no restriction is placed on x and you can pick any x value.



Function Form means, solve for y in terms of x.  Your questions #12, 15, 18, appear to be in standard form, linear equations like ax+by=c.  Solve for y.
{{{by=c-ax}}}
{{{by=-ax+c}}}
{{{highlight(y=-ax/b+c/b)}}}



Is the equation a function or not?
This means, does y have more than one value for any x value?  If yes, then the equation is a relation, but not a function.  If no, then the equation is a function.  This assumes that the independent variable is x and the dependent variable is y.  LINES are functions, but only if not vertical.  Think on this logically, and understand that y=k for any real number k is a function; but x=k is NOT a function.