[填空题]
The following table shows()fu9 r5kbzyp54trp/n ,fv mq the x and j pwt 2g/ 4kb/tt1(oovy coordinates of five points that lie on a curve y=f(x) .otwt jo(b/p gt2v41k/ 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)
