matlab linear algebra plot

It was observed that the curve passing through the points of (100, 0.2), (400, 0.45) and (600, 0.57) can be expressed with the quadratic equation, f (x) = a + bx + cx2 i) Determine the coefficients of the quadratic equation.

ii) Plot y vs. x graph along the quadratic curve. Do not forget to label the graph properly

[Walter Roberson]

polyfit()

Answer 1

[M.Many]

Go to the tabs "Tools" -> "Basic fitting" in the plot. There you can get these values.