Fitting a equation to a set of data

I have a set of data: 1.12158 0.42563 0.07 1.12471 0.42112 0.07 1.12784 0.41685 0.07 1.13097 0.41283 0.07 1.13409 0.40907 0.07 1.13722 0.40556 0.07 1.14035 0.40231 0.07 1.14348 0.39933 0.07 1.1466 0.39661 0.07 1.14973 0.39417 0.07 1.15285 0.39201 0.07 1.15598 0.39012 0.07 1.15911 0.38852 0.07 1.16224 0.3872 0.07 1.16536 0.38618 0.07 1.16849 0.38544 0.07 1.17162 0.385 0.07 1.17474 0.38486 0.07 1.17787 0.38543 0.07 1.181 0.38714 0.07 1.18413 0.38994 0.07 1.18725 0.39378 0.07 1.19038 0.39858 0.07 1.19351 0.40426 0.07 1.19664 0.41071 0.07 1.19976 0.41786 0.07 The first column is the x-axis and the second column is the y-axis. I want to fit this data to the equation: Ax^2 + Bx + c and find out the values of A, B and c. What program can I use ? I would be very glad if you could show me how to do it. Thanks.