Final answer:
The equation in y=mx+b form represents a linear equation, where m represents the slope and b represents the y-intercept. In this question, the equation in y=mx+b form is y = 7.84x + 9.80. option b.
Step-by-step explanation:
The equation in y=mx+b form represents a linear equation. The formula for the equation is y = mx + b, where m represents the slope of the line and b represents the y-intercept. In the given question, the earnings from stocking shelves are represented by x and the earnings from sales are represented by y. Since the hourly rate for stocking shelves is $7.84, which is the slope (m), and the hourly rate for sales is $9.80, which is the y-intercept (b), the equation in y=mx+b form would be y = 7.84x + 9.80. Therefore, the correct answer is B.