X + 3y = -15
This ^ to y=Mx+b

y = -1/3x - 5

Step-by-step explanation:

x + 3y = -15

-x            -x

3y = -x - 15

/3        /3

y = -1/3x - 5

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.