Find an equation for the line with undefined slope and passing through the point 9, -7

recall, slope = rise/run, and that a fraction is undefined when the denominator is 0, meaning this slope has a run = 0.

to make it short, when the slope is undefined, is a flag that we simply have a vertical line.  Check the picture below.

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?