Using the graph, derive the equation of the line in slope-intercept form.

y = 3x − 4

y = −3x − 4

y = 3x + 4

3x − y = 4

1 answer

To derive the equation of the line in slope-intercept form (y = mx + b), we will analyze the options given, as they seem to represent different lines.

  1. Slope-Intercept Form:

    • The form \(y = mx + b\) indicates that \(m\) is the slope and \(b\) is the y-intercept.
  2. Given Options:

    • Option 1: \(y = 3x - 4\) (Slope = 3, Y-intercept = -4)
    • Option 2: \(y = -3x - 4\) (Slope = -3, Y-intercept = -4)
    • Option 3: \(y = 3x + 4\) (Slope = 3, Y-intercept = 4)
    • Option 4: \(3x - y = 4\) which can be rearranged to \(y = 3x - 4\) (Slope = 3, Y-intercept = -4)

From the options, we see that the first and fourth equations provide the same line:

  • Using the Fourth Equation: To rearrange \(3x - y = 4\) into slope-intercept form: \[ -y = -3x + 4 \] \[ y = 3x - 4 \]

Depending on where the line crosses the y-axis and its slope (visualized on the graph), we would consider the correct lines based on the graph that corresponds to the presented options.

The final equation in slope-intercept form derived from the context provided is:

\[ y = 3x - 4 \]

If you have specific coordinate points or a visual to reference, please provide them for a more accurate analysis.