We know that (0.5, 4) is not on the graph of x^2 because when x = 0.5, f(x) = 0.25.
Since our function is now f(bx), and we know that x = 0.5, then we need to multiply 0.5 by something so that (b * 0.5)^2 = 4
We can now solve for b
(b * 0.5)^2 = 4
take the square root of both sides of the equal sign
√(b * 0.5)^2 = √4
b * 0.5 = 2
divide both sides of the equal sign by 0.5
b * 0.5 / 0.5 = 2/0.5
b = 4
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