Please help, i need to know the steps of solving this question

Step-by-step explanation:

eq. of line through (-4,0) and (3,2) is

y-0=(2-0)/(3+4) (x+4)

y=2/7 (x+4)

or y=2/7 x+8/7

m1=2/7

b1=8/7

eq. of line through (-3,2) and (4,0) is

y-2=(0-2)/(4+3) (x+3)

y-2=-2/7(x+3)

y=-2/7 x-6/7 +2

or y=-2/7 x+8/7

m2=-2/7

b2=8/7

m1b2+m2b1

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18