Q. Write an exponential function in the form y=abx that goes through the points (0,16) and (2,784).Answer:
Find 'a' value: Given points: (0,16) and (2,784), we need to find the exponential function of the form y=abx. We will use the first point to find the value of 'a' since any number raised to the power of 0 is 1. Using the point (0,16), we substitute x=0 and y=16 into the equation y=abx to get: 16=ab0 Since anything raised to the power of 0 is 1, we have: (2,784)2 Therefore, (2,784)3.
Find 'b' value: Now that we have the value of 'a', we can use the second point (2,784) to find the value of 'b'. We substitute x=2, y=784, and a=16 into the equation y=abx to get:784=16b2To solve for 'b', we divide both sides by 16:16784=b249=b2Taking the square root of both sides gives us two possible solutions, b=7 or x=20. Since we are dealing with an exponential function, which typically involves growth or decay, we consider only the positive value for 'b'.Therefore, b=7.
Write exponential function: We have found the values of 'a' and 'b': a=16 and b=7. We can now write the equation of the exponential function:y=16×7xThis is the exponential function that passes through the points (0,16) and (2,784).
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