Math Problem Statement

For each table, determine whether it shows that x and y are proportional. If x and y are proportional, fill in the blank with a number in simplest form.

Solution

Let's analyze both tables to determine if the values of xx and yy are proportional, and if so, find the constant of proportionality.

Table 1

We have the following values for xx and yy: x:28,35,9x: 28, 35, 9 y:4,5,63y: 4, 5, 63

To check if xx and yy are proportional, we need to determine if the ratios yx\frac{y}{x} are constant.

  • For x=28x = 28 and y=4y = 4, the ratio is 428=17\frac{4}{28} = \frac{1}{7}.
  • For x=35x = 35 and y=5y = 5, the ratio is 535=17\frac{5}{35} = \frac{1}{7}.
  • For x=9x = 9 and y=63y = 63, the ratio is 639=7\frac{63}{9} = 7.

Since the ratios are not the same (i.e., 17\frac{1}{7} and 7), the values of xx and yy in Table 1 are not proportional.

Table 2

We have the following values for xx and yy: x:4,5,9x: 4, 5, 9 y:8,15,36y: 8, 15, 36

Again, we'll check if the ratios yx\frac{y}{x} are constant.

  • For x=4x = 4 and y=8y = 8, the ratio is 84=2\frac{8}{4} = 2.
  • For x=5x = 5 and y=15y = 15, the ratio is 155=3\frac{15}{5} = 3.
  • For x=9x = 9 and y=36y = 36, the ratio is 369=4\frac{36}{9} = 4.

Since the ratios are not the same (i.e., 2, 3, and 4), the values of xx and yy in Table 2 are also not proportional.

Summary:

  • Table 1: Not proportional
  • Table 2: Not proportional

Would you like to dive into any specific part of the analysis or have further questions? Here are some related questions for you to explore:

  1. How do we define proportional relationships mathematically?
  2. What is the importance of the constant of proportionality?
  3. How can we use graphing to check if two quantities are proportional?
  4. Can two sets of data still be proportional with varying numbers in them?
  5. What are some real-world examples where proportional relationships are used?

Tip: Always check if the ratio yx\frac{y}{x} is constant for all pairs to determine if two variables are proportional.

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Math Problem Analysis

Mathematical Concepts

Proportional Relationships
Ratios
Constant of Proportionality

Formulas

Ratio formula: y/x
Constant of Proportionality: k = y/x

Theorems

Concept of Proportionality in Mathematics

Suitable Grade Level

Grades 6-8