To determine the location of the point (-4,9) on a coordinate grid, we need to use the x-coordinate and y-coordinate values of the point.
The x-coordinate represents the horizontal position of the point, while the y-coordinate represents the vertical position of the point.
In this case, the x-coordinate is -4, which means the point is 4 units to the left of the origin. The y-coordinate is 9, which means the point is 9 units up from the origin.
Therefore, the point (-4,9) is located in the 2nd quadrant of the coordinate grid, since it is to the left of the origin (in the negative x-direction) and above the origin (in the positive y-direction).
So, the correct answer is B-2nd.