If f(x) is the slope of a trail at a distance of x miles from the start of the trail, what does 7 f(x)dx 5 represent? The change in the elevation between x = 5 miles and x = 7 miles from the start of the trail. The elevation at x = 5 miles from the start of the trail. The elevation at x = 7 miles from the end of the trail. The elevation at x = 7 miles from the start of the trail. The change in the elevation between x = 5 miles and x = 7 miles from the end of the trail.

The answer is option A

Step-by-step explanation:

From the question given, the limit is between 5 and 7, the differentiation starts from the beginning of the trail

l.ln.lln.k.nkl

step-by-step explanation:

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.