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Mathematics

Grade9

Easy

Question

Find the unknown coordinate so the line through the points (4,-3), (7,y) has a slope 2.

6
-5
3
-9

hint Hint:

In the question we have to find y where slope is given and the coordinates are given So we will use the formula of finding the slope $fraction numerator y subscript 2 minus y subscript 1 over denominator x subscript 2 minus x subscript 1 end fraction$ .

The correct answer is: 3

The slope of the line with coordinates(4,-3) and (7,y) = 2
$fraction numerator y subscript 2 minus y subscript 1 over denominator x subscript 2 minus x subscript 1 end fraction$ =2
$rightwards double arrow fraction numerator y minus left parenthesis negative 3 right parenthesis over denominator 7 minus 4 end fraction equals 2 rightwards double arrow fraction numerator y plus 3 over denominator 3 end fraction equals 2 rightwards double arrow y plus 3 equals 6 rightwards double arrow y equals 6 minus 3 rightwards double arrow y equals 3$

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