Tham khảo tài liệu 'number operation review 5', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | NUMBERS AND OPERATIONS REVIEW Comparison of Road Work Funds of New York and California KEY New York California Broken-Line Graphs Broken-line graphs illustrate a measurable change over time. If a line is slanted up it represents an increase whereas a line sloping down represents a decrease. A flat line indicates no change as time elapses. Scatterplots illustrate the relationship between two quantitative variables. Typically the values of the independent variables are the x-coordinates and the values of the dependent variables are the -coordinates. When presented with a scatterplot look for a trend. Is there a line that the points seem to cluster around For example College GPA 64 NUMBERS AND OPERATIONS REVIEW In the previous scatterplot notice that a line of best fit can be created College GPA Practice Question Lemonade Sold 16-1 2 14- Based on the graph above which of the following statements are true I. In the first hour Vanessa sold the most lemonade. II. In the second hour Lupe didn t sell any lemonade. III. In the third hour James sold twice as much lemonade as Vanessa. a. I only b. II only c. I and II d. I and III e. I II and III Answer d. Let s evaluate the three statements Statement I In the first hour Vanessa sold the most lemonade. In the graph Vanessa s bar for the first hour is highest which means she sold the most lemonade in the first hour. Therefore statement I is TRUE. Statement II In the second hour Lupe didn t sell any lemonade. 65 ------------------------- NUMBERS AND OPERATIONS REVIEW --------------------------------- In the second hour there is no bar for James which means he sold no lemonade. However the bar for Lupe is at 2 so Lupe sold 2 cups of lemonade. Therefore statement II is FALSE. Statement III In the third hour lames sold twice as much lemonade as Vanessa. In the third hour James s bar is at 8 and Vanessa s bar is at 4 which means James sold twice as much lemonade as Vanessa. Therefore statement III is TRUE. Answer Only statements I .
