Which rule can be used to describe the growth of the y-values of the function y = 12x over each interval from x=-1 to x=3

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The function y=12x when plotted using the interval of x-values from - 1 to 3 will give a straight line on a given plot. Therefore the function rule of a line y=mx+b can be used to describe the growth or progression of this function. The rule states that y is directly proportional to x.