1. The table below shows the distance by a caterpillar as it crawls along a sidewalk, over a period of 30 mins.

Time(m)- 1 , 2, 3.5, 4, 4.8

Distance(m) - 15.3 , 30.1, 50.6 58.1 71.4

Based on an appropriate regression model, the distance traveled by the caterpillar after 8.5 minutes, rounded to the nearest whole meter is expected to be _______ m.

2 ( Basically a table again)

x- 0, 1, 2. 3, 4, 5, 6, 7

y- 231, 253.3, 273.8 284.1 294.1 303.6 268.6 383.7

When written if the formy= ax³ + bx² + cx+d, the value of a, the leading coefficient, to the nearest hundredth is ____________.