Math Problem Statement

Consider the equation y = -3x + 6. Plot the points that correspond to when x = -1 and when x = 1.

Solution

To solve this task, we need to plot points for the equation y=3x+6y = -3x + 6 when x=1x = -1 and when x=1x = 1.

Let's go through the calculations:

  1. For x=1x = -1: y=3(1)+6=3+6=9y = -3(-1) + 6 = 3 + 6 = 9 So, the point when x=1x = -1 is (1,9)(-1, 9).

  2. For x=1x = 1: y=3(1)+6=3+6=3y = -3(1) + 6 = -3 + 6 = 3 So, the point when x=1x = 1 is (1,3)(1, 3).

The two points to plot on the graph are:

  • (1,9)(-1, 9)
  • (1,3)(1, 3)

Would you like further details on graphing this line or have additional questions about linear equations?

Here are some related questions for further exploration:

  1. How do you determine the slope of a linear equation?
  2. What does the y-intercept of this line represent?
  3. How would the graph change if the equation were y=3x+6y = 3x + 6 instead?
  4. What are the x- and y-intercepts of this line?
  5. How can you check if a point lies on the line of this equation?

Tip: Remember that in the equation y=mx+by = mx + b, mm represents the slope and bb is the y-intercept, which is where the line crosses the y-axis.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

y = mx + b

Theorems

Slope-intercept form of a line

Suitable Grade Level

Grades 8-10