If the gradient of the line joining the points (-3,-7) and (4,b) is equal to 3/5, find b
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gradient means slope (m) = 3/5
we know that m=y2-y1 / x2-x1
therefore, 3/5=b+7/4+3
3 x 7= 5(b+7)
21=5b+35
21-35/5=b
-14/5=b
-2.8=b
we know that m=y2-y1 / x2-x1
therefore, 3/5=b+7/4+3
3 x 7= 5(b+7)
21=5b+35
21-35/5=b
-14/5=b
-2.8=b
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