Final answer:
The equation y = -20x + 24 is in the correct format of y = mx + b; hence the answer is A) y = -20x + 24.
Step-by-step explanation:
The equation y = -20x + 24 is already in the slope-intercept form of a linear equation, which is y = mx + b, where m represents the slope and b represents the y-intercept. Therefore, the correct choice is A) y = -20x + 24.