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When the equation is given in the standard form: y = mx + c, the gradient is m. So here, y = 7x + 2 means m, the gradient, is 7.
3y = -5x+2 y = -5/3x+2/3 The gradient is -5/3 and the y intercept is 2/3
The one which shows a straight line with a positive gradient of 3 and crossing the y axis at 2.
y = 3x + 1 is a linear equation - it is the equation for a graph of a straight line that crosses the y axis at 1 and the x axis at -1/3, and has a gradient (slope) of 3.
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