SOLUTION: Write a formula for y in terms of x if y is proportional to the 4th power of x, and y=11.745 when x=3

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Question 1170176: Write a formula for y in terms of x if y is proportional to the 4th power of x, and y=11.745 when x=3
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!
+y+=+kx%5E4+


y=11.745 when x=3 allows you to find k:
+11.745+=+k%2A3%5E4+

+11.745+=+81k+

Solving for k:
+k+=+11.745%2F81+=+0.145


Now you can write:
+y+=+0.145x%5E4+