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Find the gradient of a line through two points

DIFFICULTYintrostandardchallengeexam
Question 1 of 8

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Grid lines are one unit apart on each axis

Cartesian graph with horizontal axis x and vertical axis y, using unit gridlines. The window is x from -3 to 3 and y from -8 to 12. Line L is drawn from (-3, -7) to (3, 11). Its marked points are (-1, -1) and (2, 8), labelled S and T respectively.-3-2-11230-8-6-4-224681012STLxy
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What is the gradient of line L?