(3) let p(x) denote the collection of all finite subsets of a set x what is the cardinality of the set p(r)? prove your claim

Step-by-step explanation:

Range is the set of y values for which the function is defined

To find out the range we look at the value of k in the vertex

General vertex form is :

where (h,k) is the vertex that is maximum when a is negative

From the given equation the value of k= -1

The graph reaches the maximum value at y=-1

So range is