BOSTON (AP) — A new poll shows support for all three initiatives on the Massachusetts ballot next month, but approval for the so-called ‘‘death with dignity’’ question appears to be slipping.

The Suffolk University/WHDH-TV poll shows Question 2 supported by a 47 to 41 percent margin, compared with a 64-27 percent margin of backing in a similar poll taken six weeks earlier.

The proposal would allow doctors to prescribe life-ending medication at the request of certain terminally ill patients.

Nearly three-quarters of those surveyed backed Question 1, which would require automakers to share diagnostic and repair information with independent mechanics. Fifty-five percent backed Question 3, which would allow marijuana to be used for some medical purposes.