The area of the region bounded by the curve y = f(x), x axis and the lines x = a and x = b, (b > a) is given by
1
\(\displaystyle\int_a^b x \ dx\)
2
\(\displaystyle\int_a^b y \ dy\)
3
\(\displaystyle\int_a^b y \ dx\)
4
\(\displaystyle\int_a^b x \ dy\)