Graph Analysis$*$

Use the graph below to answer the following questions.

$6$

Numeric

$1$ point

Calculate the displacement $x$ in meters of the object from $20$ s to $40$ s $.$

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$7$

Numeric

$1$ point

What is the acceleration of the object from $40$ s to $50$ s $?$ Use $3$ significant figures. Don't forget acceleration is a vector and has a magnitude and direction $($which can be negative and if it is then your answer need to have the sign included$).$

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$8$

Multiple Choice

$1$ point

Which of the graphs below is the correct acceleration$-$time graph for the given velocity$-$time graph?