B. Accuracy is if it's right or not. Precision is how many decimal places it goes out to. So it is precise but not accurate.
The slope is negative, so the slope is negative. Using the rise over run formula, the slope of the line should be -1.
We can find the acceleration via

We have


Then by definition of average acceleration,

so that


We alternatively could have found the time without knowing the acceleration. Since acceleration is constant, the average velocity is

Then


Answer:
B) 4
Step-by-step explanation:
Tan is opposite/adjacent. That means that 3 is the opposite side while 4 is the adjacent side.