What is the quadratic regression equation that fits these data? X Y -4 40 -3 28 -2 10 -1 8 0 7 1 10 2 16 3 26 4 40 A. y = 16.76.1.02% O B. y = 0.82x2 + 0.78x + 7.23 C. y = 1,64x2 + 1.24x+ 8.08 ما O D. y = 2.13x2 + 0.13x + 6.39​

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

13cm

step-by-step explanation:

(apex)