Which of the following are not necessary when proving that the diagonals of a rectangle are congruent? check all that apply.
a. all obtuse angles are congruent.
b. opposite sides are congruent.
c. opposite sides are perpendicular.
d. all right angles are congruent.

  b.   the average rate of change of f(x) is less than the average rate of change of g(x).

step-by-step explanation:

since the length of the interval is the same in each case, we only need to compare the change in y-value to see which is greater.

so the change in y-value for function f is (6 )) = 9.

the table tells us

so the change in y-value for function g is (31 -1) = 30.

the change in y-value of f(x) on the interval is less than the change in y-value of g(x) on the same interval, so the average rate of change of f(x) is less than the average rate of change of g(x).

c

step-by-step explanation:

1/2(2*4)=6 $$- agahajakanajak