just answer no need to explain lol

The correct answer for the question shown in the image attached is the third (option C), which is:

 C. Shifted upwards by 28 units

 The explanation is shown below:

 1. The problem gives you the following linear function:

 f(x)=ax+b

  Where a is the slope and b is the y-intercept

 2. When you graph that linear function, you obtain a line.

 3. Therefore, if b (y-incercept) increases 28,000; the line will shifted 28 units upwards.

 4. As you can see, the correct answer is the option mentioned above.