another wrong answer from sparknotes!(Math)

Test Preparation SAT Preparation
1

<p>The linear function h(x) has a slope of -1/3. What is the slope of the line h^-1(x) (inverse of the function h(x))?</p>

<p>Isnt it negative reciprocal of -1/3 which is 3? The answer explicitly stated 3. Have a look:</p>

<p>E is not the correct answer. You should have selected A.
EXPLANATION
Don’t be horrified that this problem asks you about the slope of a function but doesn’t even tell you what the function is! It doesn’t matter. All you need to know is that the negative exponent creates an inverse function and that the slope of two inverse linear functions are reciprocals of each other. The reciprocal of is –3, so A is the correct answer.</p>

<p>This explanation is soooo wrong</p>

2

<p>No, it’s correct.</p>

3

<p>EDIT: nevermind, read it wrong</p>