To determine which equation best describes the graph, let’s analyze the given line:

1. Identify the slope:
   The line moves upwards as you move to the right, which indicates a positive slope. Therefore, the slope is positive, which eliminates options A, B, and C, because their slopes are negative.

2. Y-intercept:
   The line crosses the y-axis at -4. This means the y-intercept (b) is -4.

3. Equation of the line:
   The standard form of a linear equation is:
   $y = mx + b$ where $m$ is the slope and $b$ is the y-intercept.
   Since the slope is positive and the y-intercept is -4, the equation becomes:
   $y = 5x - 4$

Correct Answer: D. $y = 5x - 4$

Let me know if you would like a breakdown of how to calculate slope or additional details!

Here are 5 related questions for practice:

1. How do you calculate the slope of a line given two points?
2. What is the slope-intercept form of a linear equation?
3. How do you determine the y-intercept from a graph?
4. How can you tell if a slope is positive or negative just by looking at the graph?
5. How do you graph a line given its equation?

Tip: A positive slope means the line rises as you move to the right, while a negative slope means it falls.