Final answer:
The whiteness of the color line with a slope of -3 and passing through the points (-5, 4) is -3.
Step-by-step explanation:
The whiteness of the color line with a slope of -3 and passing through the points (-5, 4) can be found using the point-slope form of a linear equation. The equation is given by y - y1 = m(x - x1), where (x1, y1) are the coordinates of a point on the line and m is the slope. Substituting the values (-5, 4) and -3 into the equation, we get y - 4 = -3(x - (-5)). Simplifying, we get y - 4 = -3(x + 5). Distributing the -3, we get y - 4 = -3x - 15. Adding 4 to both sides, we find y = -3x - 11.
So, the equation of the line is y = -3x - 11, which represents the whiteness of the color line. The coefficient of x, -3, is the slope of the line. Therefore, the answer is -3, option c.