Exponential Distribution $\lambda$

Question

I assume $\lambda$ in exponential distributions is interpreted as the chance of failure per unit of time.

If so, how come this diagram have $\lambda$ greater than 1? That means there's no survival and the graph should be a flat line at zero?

Textbook example:

Answer 1

Here, the rate refers to the expected number of failure per hour.

$\lambda$ can be any positive number.