[填空题]
The following table shows the x and y coo*et*pp +xe2 xkrdupv+ j28 m)s4zb;jcrkxn93kf t44 cyo inates of five points that lie on a curve y=f(x) .
c+2xjo jrnufky8b9t3 4c4 k;p m4)zvs 1. Estimate the area under the curve over the interval 1 The equation of the curve was found to be y=-$\frac{1}{10}(4 x+5)(x-8)$ .
it is approximately equal to units$^2$
2. Find the exact value of the area under the curve over the interval 1A=$\frac{a}{b}$;a= ,b= .
3. Find the percentage error between the estimation in part (a) and the exact value in part (b). Provide a reason for the difference.it is approximately equal to %(two decimal places)
