1. For the Desmos graph and regression, determine the acceleration and initial velocity of the RipStik from a Wednesday run. Times are in seconds, distances in centimeters.
   
   
   acceleration: __________ __________
   
   initial velocity: __________ __________
2. A student rolled marbles into a line of five marbles.
   
   1. What happens when one marble is rolled into five marbles on a ruler track?
   2. What happens when two marbles are rolled into five marbles on a ruler track?
   3. How is the number of marbles rolling into a line of marbles related to the number rolling out of a line of marbles?
   4. What happens when the number of marbles rolling into a line of marbles on the ruler track is greater than the number marbles in that line of marbles on the ruler? For example, what happen when six marbles roll into four marbles?
   5. Explain why you think the marbles know what to do.
3. For the Desmos graph and regression, determine the acceleration of gravity from a Thursday laboratory. Times are in seconds, distances in centimeters.
   
   1. acceleration of gravity: __________ __________
   2. __________ __________ What is the raw error with respect to the published value of 980 cm/s²?
   3. ________________ What is the percent error?
   4. ______________________ How good is the agreement of the experimental value to the published value?