QuadraticEase

It creates an animation that accelerates/decelerates using the formula f(t) = t2. You can use PowerEase to create the same behavior by specifying Power="2". In this example, we will learn how to add the QuadraticEase function to an animation. Add the following mark-up inside the StackPanel that we have defined:

<RadioButton GroupName="AnimationSelector" 
             Content="QuadraticEase - EaseInOut" 
             Margin="4"> 
    <RadioButton.Triggers> 
        <EventTrigger RoutedEvent="RadioButton.Checked"> 
            <BeginStoryboard> 
                <Storyboard AutoReverse="True"> 
                    <DoubleAnimation  
                    Storyboard.TargetName="circle" 
                    Storyboard.TargetProperty="(Canvas.Left)" 
                    To="350"> 
                        <DoubleAnimation.EasingFunction> 
          ...