Which equation can be simplified to find the inverse of y is equal to x squared minus 7 ?
Answer
A
x is equal to y squared minus 7
B
x is equal to y squared minus 1 seventh
C
negative x is equal to y squared minus 7
D
1 over x is equal to y squared minus 7
Explanation
To find an inverse, switch x and y in the original equation y = x² − 7. This gives x = y² − 7, which is choice B. The other equations do not result from switching the variables.
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