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Find the value of "r" so the line that passes through each pair of points has the given slope. (4,-5), (3,r) m=8 My answer is -3. Am I correct? Here is how I got my answer: r - -5 over 3 - 4 8 = r- -5 _________ 1 -1 8(-1)= 1(r - -5) -8= 1r - -5 +5 +5 ____________ -3=r
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The slope of the line that passes through each point is determined by the value of "r". (4,-5), (3,r) m=8 My answer is -3. Can I be sure that I am correct? ----------------------- (r--5)/(3-4) = 8 (r+5)/-1 = 8 r+5 = -8 r = -13 ============ Cheers, Stan H.
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point-slope form y-y[1]=m(x-x[1]) m=8 let r=y, -5=y[1], 3=x, 4=x[1] you can do it the other way and the answer will be the same. r-(-5)=8(3-4) r+5=-8 add -5 to both sides r= -13 . Ed
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