Bahira is determining what happens to the quadratic equation y 15% + 8x + 3 If the 1 is changed to -1. Which of the following best describes the effect?
A) changes the quadratic to concave down
B) changes the quadratic to concave up
C) moves the y-intercept up 2 units
D) moves the y-intercept down 2 units

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?