f(x) = a + b x + cf(x) = 90 21 67

x2

-6 -4 -2 0 2 4 60

500

1000

1500

2000

2500

y

x y-5 2212-3 877-1 1570 671 1573 8775 2317

f(x) = a + b x + c xf(x) = 1 0 4 -5

-3-10135

x2

-6 -4 -2 0 2 4 60

5

10

15

20

25

30

35

y

y2913545

1329