Question 535253
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The distance formula for the distance between two points is d = sqrt ((x2-x1)^2 + (y2-y1)^2).<P>

In this case we'll call (1,1) point 1 and (-0.5,-1) point 2.<P>

d = sqrt ((-.5-1)^2 + (-1-1)^2) = sqrt (2.25+4) = sqrt (6.25) = 2.5.