Question

(a) x 2 hours (c) x- 12 hours b) x2 5 hours (d)x4 5 hours slop. to tree deinal places as needed Round the yelecept to two decimal places扔needed } Ос. O 0. a.

Answer 1

X	Y	XY	X^2	Y^2
0	39	0	0	1521
1	44	44	1	1936
3	52	156	9	2704
3	48	144	9	2304
4	63	252	16	3969
6	72	432	36	5184

From the above table and formual we get the value are as below:

n	6
sum(XY)	1028.00
sum(X)	17.00
sum(Y)	318.00
sum(X^2)	71.00
sum(Y^2)	17618.00

b	5.5620
a	37.2409

y = a + bx

= 37.24 + 5.562x

a)

when x = 2

y = 37.24 + 5.562x
= 37.24 + 5.562 * 2
= 48.364

b)
when x = 2.5
y = 37.24 + 5.562x
= 37.24 + 5.562 * 2.5
= 51.145

c)
when x = 12

y = 37.24 + 5.562x
= 37.24 + 5.562 * 12
= 103.984

d)

when x = 4.5
y = 37.24 + 5.562x
= 37.24 + 5.562 * 4.5
= 62.269