Question: Helen is doing a study where she is looking at the percentage of students proficient in mathematics over a 10-year period in a school district.
Helen is doing a study where she is looking at the percentage of students proficient in mathematics over a 10-year period in a school district. What would be the best way to display the trend in percentages?
a) a scatterplot
b) a bar graph
c) a line graph
d) calculate the mean and standard deviation
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