How can you predict the curve of a graph if you only have the final point and the curve of a similar graph?

I have a graph with a curve on it and I want to plot a rough graph with a similar shape. For the new graph I have only the starting and final points. How can I predict the new graph?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).