[3] Dayal was born in the Samastipur district of North Bihar, the Mithila region famous for Madhubani painting.
She has worked to bring innovation in the traditional art practiced in Mithila, and train other women artists from the region at her studio in New Delhi.
Her style is known for bringing a contemporary cast to traditional Madhubani art using modern media such as acrylic and canvas.
[4] Dayal's seven Madhubani paintings, which are a combination of traditional art with contemporary modern subjects, are included in the book The New Bihar.
Singh and Nicholas Stern have observed: "Bharti's use of the traditional style on contemporary themes can contribute to the revival of Madhubani art".