Math Problem Statement

Which of the following can be represented by the equation y = 2x? Options are Table A only, Graph B only, Table A and Graph B, or Neither Table A nor Graph B.

Solution

The problem asks which of the following can be represented by the equation y=2xy = 2x, with the choices being Table A, Graph B, both, or neither.

Analyzing the options:

  1. Table A:

    • The equation given is y=2xy = 2x, so for each xx value in the table, yy should be twice the xx value.
    • Checking Table A:
      • When x=2x = 2, yy is 3. According to y=2xy = 2x, yy should be 2(2)=42(2) = 4, not 3.
      • When x=4x = 4, yy is 6. According to y=2xy = 2x, yy should be 2(4)=82(4) = 8, not 6.
      • When x=6x = 6, yy is 9. According to y=2xy = 2x, yy should be 2(6)=122(6) = 12, not 9.
    • Therefore, Table A does not represent the equation y=2xy = 2x.
  2. Graph B:

    • The equation y=2xy = 2x represents a straight line with a slope of 2 and a y-intercept of 0.
    • Checking Graph B:
      • The line passes through the origin (0, 0), which fits the equation y=2xy = 2x.
      • The slope (rise over run) between points on the line matches a slope of 2. For example, from (0,0) to (1,2), the rise is 2 and the run is 1, which gives a slope of 2.
    • Therefore, Graph B represents the equation y=2xy = 2x.

Conclusion:

The correct answer is B: Graph B only.


Do you want any further details or have any other questions?

Here are some related questions to explore:

  1. How do you find the slope of a line given two points?
  2. What is the general form of a linear equation?
  3. How can you identify the slope and y-intercept from a graph?
  4. Can a table of values always represent a linear equation?
  5. What does it mean when a table does not follow a linear relationship?

Tip: When analyzing tables for linear equations, always check if the changes in yy correspond consistently with the changes in xx.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing Linear Functions
Analyzing Tables

Formulas

y = mx + b (Slope-Intercept Form)

Theorems

Slope Formula
Linear Relationship

Suitable Grade Level

Grades 6-8