Motion — practice question

The graph illustrates how a car’s speed changes over part of a journey. What is the car’s acceleration between $6.0\,\text{s}$ and $10.0\,\text{s}$?

• A$0.50\,\text{m s}^{-2}$
• B$0.80\,\text{m s}^{-2}$
• C$1.25\,\text{m s}^{-2}$
• D$1.50\,\text{m s}^{-2}$