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Write an exponential function in the form 
y=ab^(x) that goes through the points 
(0,16) and 
(2,784).
Answer:

Write an exponential function in the form y=abx y=a b^{x} that goes through the points (0,16) (0,16) and (2,784) (2,784) .\newlineAnswer:

Full solution

Q. Write an exponential function in the form y=abx y=a b^{x} that goes through the points (0,16) (0,16) and (2,784) (2,784) .\newlineAnswer:
  1. Find 'a' value: Given points: (0,16)(0, 16) and (2,784)(2, 784), we need to find the exponential function of the form y=abxy = ab^x. We will use the first point to find the value of 'a' since any number raised to the power of 00 is 11. Using the point (0,16)(0, 16), we substitute x=0x = 0 and y=16y = 16 into the equation y=abxy = ab^x to get: 16=ab016 = ab^0 Since anything raised to the power of 00 is 11, we have: (2,784)(2, 784)22 Therefore, (2,784)(2, 784)33.
  2. Find 'b' value: Now that we have the value of 'a', we can use the second point (2,784)(2, 784) to find the value of 'b'. We substitute x=2x = 2, y=784y = 784, and a=16a = 16 into the equation y=abxy = ab^x to get:\newline784=16b2784 = 16b^2\newlineTo solve for 'b', we divide both sides by 1616:\newline78416=b2\frac{784}{16} = b^2\newline49=b249 = b^2\newlineTaking the square root of both sides gives us two possible solutions, b=7b = 7 or x=2x = 200. Since we are dealing with an exponential function, which typically involves growth or decay, we consider only the positive value for 'b'.\newlineTherefore, b=7b = 7.
  3. Write exponential function: We have found the values of 'a' and 'b': a=16a = 16 and b=7b = 7. We can now write the equation of the exponential function:\newliney=16×7xy = 16 \times 7^x\newlineThis is the exponential function that passes through the points (0,16)(0, 16) and (2,784)(2, 784).

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