Hi. Im drawing a complete blank on this calc problem.(adsbygoogle = window.adsbygoogle || []).push({});

Point a moves along the x-axis at the constant rate of 'a' ft/sec

while point b moves along the y-axis at the constant rate of 'b'

ft/sec. Find how fast the distance between them is changing when A is

at the point (x,0)and B is at the point (0, y).

I know that dx / dt = a, and dy / dt = b, however Im stuck on where to go afterwards. I drew a graph and thought that the slope would lead

me to an answer, but I cant quite figure it out. Since Im looking for the change in distance between the two points I figured that I may have to incorporate the distance formula rather than some formula with slope, however I cant quite figure out how to go about it.

Thanks in advance for any help.

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# Homework Help: Rate of Change in a coordinate plane

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