# How do you find an equation of a line containing the point (1, -1), with undefined slope?

Apr 26, 2016

Insufficient information given to build an equation

#### Explanation:

$\textcolor{red}{\text{Assumption: this is for a straight line}}$

Standard form:$\text{ } y = m x + c$

Given point$\to {P}_{1} \to \left(x , y\right) \to \left(1 , - 1\right)$

So $y = m x + c \text{ "->" } - 1 = m \left(1\right) + c$

You may insert any values you wish into $m$ or $c$ to take this calculation further and determine the final equation