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Go to the Insert tab and insert a 2-D line graph. Right-click on the line and select the Format Data Series. Go to the Fill & Line tab. Check the Smoothed line option.
All quadratic functions have the same type of curved graphs with a line of symmetry. The graph of the quadratic function \(y = ax^2 + bx + c \) has a minimum turning point when \(a \textgreater 0 ...