Final answer:
The line of best fit for the scatter plot can be represented by the equation y = 2x + 4.
Step-by-step explanation:
The equation that could be a line of best fit for the scatter plot is option d. y = 2x + 4. To determine the line of best fit, we look for an equation that represents the trend of the data points on the scatter plot. Based on the given options, option d has a positive slope (2), indicating an upward trend, and a positive y-intercept (4), indicating that the line starts above the x-axis.
In contrast, option a has a positive slope but a positive y-intercept, option b has a negative slope, and option c has a negative slope but a positive y-intercept. These options do not match the trend of the data points.