A certain human red blood cell has a diameter of 0.000007 meters. Which expression represents this diameter, in meters, in scientific notation?

A function has the following properties: $\quad\bullet\,$ It is increasing and linear when the value of $x$ is between $-5$ and $-3.$ $\quad\bullet\,$ It remains constant when the value of $x$ is between $-3$ and $0.$ $\quad\bullet\,$ It is decreasing and linear when the value of $x$ is between $0$ and $3.$ $\quad\bullet\,$ It is increasing and nonlinear when the value of $x$ is between $3$ and $5.$ Which graph BEST represents this function?