Question

8 multiple choice 1 point a teacher tracks her students test scores each week throughout the semester to see how their performance changes over time. which type of graph is best for showing this trend? circle graph pictograph bar graph line graph 9 multiple choice 1 point tara made this line graph to show the grades that she got on all of her quizzes, in the order that she took them to track her progress during the semester. which of these statements about this graph is (are) true? i taras last four quiz scores were the same. ii taras quiz scores have continually improved. iii tara has not had a quiz score lower than 60. iv taras mode score is an 80. i and iii i and iv i only i,iii,iv

Explanation:

• Question 8: A line graph is ideal for showing trends over time as it connects data points, making it easy to visualize changes. A circle graph shows parts of a whole, a pictograph uses pictures for data representation, and a bar graph is better for comparing discrete values.
• Question 9:
• Statement I: Looking at the line graph, the last four quiz scores (points on the graph for the last four quizzes) are at the same level (same \(y -\)value), so this is true.
• Statement II: The scores have fluctuations (e.g., there is a drop from quiz 2 to 3), so they have not continuously improved. This is false.
• Statement III: The lowest score (the lowest \(y -\)value on the graph) is above 60. This is true.
• Statement IV: The mode is the most frequently occurring score. From the graph, 80 occurs more frequently than other scores. This is true.

Answer:

• Question 8: Line Graph
• Question 9: I, III, IV