Question

the equation $y = 2x - 1$ represents a function. when the input is $-1$, what is the output? input ($x$) output ($y$) $-1$

Explanation:

Step1: Substitute x with -1

We have the function \( y = 2x - 1 \). Substitute \( x = -1 \) into the equation.
\( y = 2\times(-1) - 1 \)

Step2: Calculate the value

First, calculate \( 2\times(-1)= -2 \). Then, \( -2 - 1 = -3 \).

Answer:

-3