Which statement is true about the end behavior of the graphed function?
a. as the x-values go to positive infinity, the function's values go to negative infinity.
b. as the x-values go to zero, the function's values go to positive infinity.
c. as the x-values go to negative infinity, the function's values are equal to zero
d. as the x-values go to positive infinity, the function's values go to positive infinity.