Speed

Acceleration is the rate of velocity measured on a time interval, that is defined by space.

The average, is the variants of the formulation, such as final and initial values, hence it is acknowledged to be upper case delta.

Therefore, taking into account the formula, 0.6-0.5/1 = 0.1 (m/s^2, this is the unit of the answer).

Putting this in terms of a formula

v2=v1+a*t

where v2 is final velocity (0.6 m/s)
v1 is initial velocity (0.5 m/s)
a is acceleration ( x m/s^2)
t is time (1 s)

rearranging to put a on the left (algebra)

a=(v2-v1)/t = (0.6 m/s - 0.5 m/s)/1 s = 0.1 m/s/1 s= 0.1 m/s^2

check units are right

Rap