Question

2. Which equation represents the reflection of the graph of y = b^x across the y-axis?
a. b = x^y
b. y = b^-x
c. y = -b^x
d. x = b^y

Answer 1

A reflection across the y-axis is a reflection of all the x'es into negative x'es. Try replacing x with -x in your line equation and see what you get!

Answer 2

so is it y=b^-x? because . y = -b^x is incorrect!