Tell whether each point is on the graph of f(x)=|x|.If it is, give the coordinates of another point with the same y value. 1.(11,11)

2.(-2.3,-2.3)

3.(0,1)

4.(15,-15)

5.(-8,8)

6.(1,0)

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)