Final answer:
The equations y = -3x, y = 0.2 + 0.74x, and y = -9.4 - 2x are all linear equations.
Step-by-step explanation:
The equation y = -3x represents a linear equation because it is in the form y = mx + b, where m is the slope and b is the y-intercept. Option A is a linear equation.
The equation y = 0.2 + 0.74x is also a linear equation because it has a constant slope of 0.74 and a y-intercept of 0.2. Option B is a linear equation.
The equation y = -9.4 - 2x is also linear because it has a constant slope of -2 and a y-intercept of -9.4. Option C is a linear equation.
So, the correct answer is option D, which includes equations A and B.