slope distance midpoint and endpoint questions?

Question

1. if the x-coordinates of two points on a line are the same what will the slope be?


2. what formula would you use if you have to find an endpoint of a line segment rather than its midpoint?


3.if a line has an undefined slope can the equation that describes the line be a function? why?

Answer 1

Slope = rise/run

1.) If the x coordinates are the same, there's no run. The slope is infinite/undefined (it's a vertical line)

2.) This depends on what information you're given.

3.) Yes...it could be a function of y. For example, a vertical line at x = 4 could be written as f(y) = 4. However, it cannot be a function of x.