How will you show that metals form basic oxides?

when metallic oxides react with water they form metallic hydroxides which are basic in nature.to show that these are basic in nature,we should conduct a litmus paper test.in this experiment,we will observe that red litmus turns blue on coming in contact with them. this shows that metallic oxides are basic in nature.

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6