Question

In what way is diffraction from each slit related to the interference pattern in a double-slit experiment?

Answer 1

your question is ----> In what way is diffraction from each slit related to the interference pattern in a double-slit experiment?

it should simple answer e.g., ---->
if the width of slit $\bf{d}$ is comparable to wavelength of light $\bf{\lambda}$ used then the interference pattern thus obtained in the double slit experiment is modified by diffraction from each of the two slits.

Answer 2

It is very easy just read picture I added