Math Problem Statement

Complete the table by choosing values of x for the equation y = 2x - 3 and plotting the points on a graph.

Solution

The table asks you to choose values for xx, substitute them into the equation y=2x3y = 2x - 3, and calculate the corresponding yy-values. Let's fill in the table by choosing a few values for xx and calculating yy.

Steps:

  1. Start with a few values for xx, such as x=2x = -2, x=0x = 0, and x=2x = 2.
  2. Substitute each xx into the equation y=2x3y = 2x - 3.

Calculation:

  • When x=2x = -2: y=2(2)3=43=7y = 2(-2) - 3 = -4 - 3 = -7 So, y=7y = -7.

  • When x=0x = 0: y=2(0)3=03=3y = 2(0) - 3 = 0 - 3 = -3 So, y=3y = -3.

  • When x=2x = 2: y=2(2)3=43=1y = 2(2) - 3 = 4 - 3 = 1 So, y=1y = 1.

Completed Table:

xxyy
-2-7
0-3
21

Now, you can plot these points (2,7)(-2, -7), (0,3)(0, -3), and (2,1)(2, 1) on the graph. Connect the points to draw the line.

Would you like more details on how to plot these points or graph the line?

Follow-up Questions:

  1. What happens to the graph if the slope (the coefficient of xx) changes?
  2. What does the yy-intercept tell you about the graph?
  3. Can you choose another value for xx to add more points to the table?
  4. How would the equation change if it were shifted upwards by 4 units?
  5. What is the effect of multiplying the entire equation by a constant?

Tip:

When choosing values for xx, it's often helpful to pick values that are easy to calculate and cover both negative, zero, and positive numbers to get a clear graph of the line.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Graphing
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Slope-Intercept Theorem

Suitable Grade Level

Grades 7-9