(Solved):     A particle is moving on the \( x \)-axis and the position of the particle at time ...

 

 

A particle is moving on the \( x \)-axis and the position of the particle at time \( t \) is given by \( x(t) \), whose graph is shown above. Which of the following is the best estimate for the spee time \( t=4 \) ? 0 5 time \( t=4 \) ? (A) 0 (B) 5 (C) \( \frac{15}{2} \) 10