Question

Which of the following shows the graph of y=-(2)^3 – 1?

Answer 1

The first graph

Explanation:

Given

`y = -(2)^x - 1`

Required

The graph

Set the exponent part to get the minimum/maximum of the graph

So, we have:

`y = 0 - 1`

`y = - 1`

The above implies that the curve passes through the y-axis at
`y = - 1`.

By comparing the two graphs, we can conclude that the first represents
`y = -(2)^x - 1` because it passes through
`y = - 1`