Math Problem Statement

Use the slope-intercept form to graph the equation y = -8/3x + 3. Use the graphing tool to graph the line.

Solution

The equation given in the image is in slope-intercept form:

y=83x+3y = -\frac{8}{3}x + 3

This equation follows the form y=mx+by = mx + b, where:

  • mm is the slope of the line (here, m=83m = -\frac{8}{3}),
  • bb is the y-intercept (here, b=3b = 3).

Step-by-step Graphing Instructions:

  1. Plot the y-intercept: The y-intercept is b=3b = 3. So, plot a point at (0, 3) on the y-axis.

  2. Use the slope: The slope is 83-\frac{8}{3}, meaning for every 3 units you move to the right along the x-axis, move 8 units down (since the slope is negative). From the point (0, 3), move:

    • 3 units to the right (positive direction on the x-axis),
    • 8 units down (since the slope is negative).

    This leads to the point (3, -5).

  3. Draw the line: Now, connect the two points (0, 3) and (3, -5) with a straight line.

The graph should show a downward sloping line passing through these points.

Let me know if you'd like to see the graph or need more details!


Here are five related questions:

  1. How do you find the slope from two points on a line?
  2. What is the significance of the y-intercept in real-life problems?
  3. How would you graph a line with a positive slope?
  4. What happens to the graph if the slope becomes zero?
  5. How do you convert from standard form to slope-intercept form?

Tip: When plotting lines, always remember to check the scale on both the x and y axes to ensure accuracy.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

y = mx + b (Slope-Intercept Form)

Theorems

Slope and Y-Intercept Relationship
Graphing Linear Equations

Suitable Grade Level

Grades 8-10