import numpy as np
import holoviews as hv
from holoviews import opts
hv.extension('bokeh')

opts.defaults(opts.Curve(color='#D3D3D3'))

xs = np.linspace(-5,5,100)
hv.Curve((xs,-(xs-2)**2))  * hv.Text(0, -30, 'Quadratic Curve')