Homework Help: Algebra 2

Posted by Fading on Monday, October 3, 2016 at 5:08pm.

The function f(x) = -5x. The graph of g(x) is f(x) vertically compressed by a factor of 1/4 and reflected in the x axis. What is the function rule for g(x)?

g(x) = -20x
g(x) = -5/4x
g(x) = 20x
g(x) = 5/4x

I think it's B, but I'm really not sure... please help, thanks.

Question

Homework Help: Algebra 2

Posted by Fading on Monday, October 3, 2016 at 5:08pm.

The function f(x) = -5x. The graph of g(x) is f(x) vertically compressed by a factor of 1/4 and reflected in the x axis. What is the function rule for g(x)? 

g(x) = -20x 
g(x) = -5/4x 
g(x) = 20x 
g(x) = 5/4x 

I think it's B, but I'm really not sure... please help, thanks.

dumbcow · Answer

close, the vertical compression does change it to 5/4 but what about the reflection about x-axis

Reflection changes direction of line making slope positive

skatingdj · Answer

Oh ok, thank you!