C# simple algorithm

Hi, I need a C# function to mimic the function in graph. Please see attached image. Input value range only in 0 to 10. Double input; // Data type will be Double Two input sets will be provide Double 0_in; Double 0_out; Double 1_in; Double 1_out; Output will be also Double data type Double output; Based on the (0_in, 0_out) and (1_in, 1_out), rest of all values needed to be calculated for output. For example: As per the graph, if you give 1 as input, output will be 3. if 2 is input, 6 will be output. likewise, if 7 is input, then 9 will be output. I need the function to find the output when the input is other than 1 or 2 or 7 or 10. For example, find output when the input is 5. example function: output = calculateOutput(input, 0_in, 0_out, 1_in, 1_out) Happy Bidding