exam Maths Puzzle Numerical Ability

Please explain a way to find the proportional growth factor and constant growth rate for a linear or exponential model, please use an example if needed.

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exam Other Question

32x=sqrt(1-48x) I have no example of such question and I am stuck on this one. I do know how to change to slope intercept form. This is the question: Given the equation x+ky=3, find k so that its graph has the same slope as the graph of 2x+y=5