4. a student wants to determine what type of cereal his classmates like best. he buys 3 boxes of his most favorite puffed rice cereal and one oat cereal. he pours 5 bowls of each cereal and gave one to 20 of his classmates. he asks if they liked the cereal they had or not. his data shows that more people like the puffed cereal more than the oats cereal. he comes to the conclusion that the puffed cereal is better than the oats cereal. what is wrong with the student's conclusion?

a. the student's conclusion is not honest

b. the student's conclusion shows cultural bias

c. the student's conclusion shows skepticism

d. the student's conclusion shows experimental bias

D
The student's conclusion shows experimental bias
Just because most of nis classmates like puffed cereal ,it is inappropriate to conclude puffed cereal is better than oats cereal

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

The actual answer is c force stays the same while direction changes