A particle is moving in a straight line with constant velocity, and its position at time t seconds is x(t) metres. If x(1) = 6 and x(5) = −12, find the velocity of the particle.

Explanation

The velocity is
`(x(5)− x(1))/( 5−1) = (−12−6)/ 4 = − 9/2` m/s.