Final answer:
The slope calculated using the given points (28, 86) and (34, 83) is -0.5. This does not match any of the provided answer choices, which might suggest there has been an error either in the question or in the provided options.
Step-by-step explanation:
To find the slope of the line that passes through two points, you can use the formula m = (Y2 - Y1) / (X2 - X1), where (X1, Y1) and (X2, Y2) are the given points. In this case, the points are (28, 86) and (34, 83). Plugging in the values, we get:
m = (83 - 86) / (34 - 28) = (-3) / (6) = -0.5.
However, the options given (A. -3, B. -1, C. -2, D. -4) do not include -0.5. It appears there may have been a mistake in either the calculation or the options provided.
The correctly calculated slope of -0.5 does not match any of the choices, thereby suggesting a possible error.