Domain and range of f ( x ) = 2/7 x - 2

answer:

domain:  

(

−

∞

,

∞

)

,

{

x

|

x

∈

r

}

range:  

[

−

7

,

∞

)

,

{

y

|

y

≥

−

7

}

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.