7.2D STUDENT ACTIVITY #1 - rgccisd

GRADE 7 MATHEMATICS(7.2) Number, operation, and quantitative reasoning. The student adds, subtracts, multiplies, or divides to solve problems and justifysolutions. The student is expected to: (D) use division to find unit rates and ratios in proportional relationships such as speed, density, price,recipes, and student-teacher ratio.PART II Procedure:•Work with a group of 4.•Use the large sheet of inch grid paper, peel-and-stick dots, meterstick and markers to make ascatterplot to represent the data in the Purple Paint Record table.•Label your scatterplot.•Display your scatterplot on the wall in the classroom.Answer the following questions about your graph:•Does your graph represent a proportional relationship? Explain your answer.•Write an equation which describes the relationship between the number of blue cubes and thenumber of red cubes.•What is the constant of proportionality for this relationship?•Explain the meaning of the constant of proportionality.•If the paint mixer had started with a gallon of paint which already had 2 drops of blue coloring,then he added 2 drops of red and 3 drops of blue and continued to add drops in this way howwould the graph be different?•Would this new graph represent a proportional relationship? Explain your answer.TEKSING TOWARD TAKS 2009 6 Weeks 4 - Lesson 1 Page8