# What is the value of the function y=2x-3 when x=-1?

Dec 7, 2016

y = -5

#### Explanation:

Substitute $- 1$ for $x$ in the equation and solve for $y$:

$y = 2 x - 3$

$y = 2 \left(- 1\right) - 3$

$y = - 2 - 3$

$y = - 5$