For a standard normal distribution, which of the following variables always equals 1

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .