Find all answer of these question?
Answers
The points given in the figure 4.6 are (0,0), (-1,1), (1,-1)
Substituting the values for x and y from these points in the equations, we get,
(i) y = x
(0,0) ⟹ 0 = 0
(-1, 1) ⟹ -1 ≠ 1 ————————— equation not satisfied
(1, -1) ⟹ 1≠ -1 ————————— equation not satisfied
(ii) x+y = 0
(0,0) ⟹ 0+0 = 0
(-1, 1) ⟹ -1+1 = 0
(1, -1) ⟹ 1+(-1) =0
(iii) y = 2x
(0,0) ⟹ 0 = 2×0
0 = 0
(-1, 1) ⟹ 1 = 2×(-1)
1≠ -2 ————————— equation not satisfied
(1, -1) ⟹ -1 = 2×1
-1 ≠ 2 ————————— equation not satisfied
(iv) 2+3y = 7x
(0,0) ⟹ 2+(30) = 7×0
2 ≠ 0 ————————— equation not satisfied
(-1, 1) ⟹ 2+(3×1) = 7×-1
5 ≠ -7 ————————— equation not satisfied
(1, -1) ⟹ 2+(3×-1) = 7×1
-1 ≠ 7 ————————— equation not satisfied
Since, only equation x+y = 0 satisfies all the points, the equation whose graphs are given in Fig. 4.6 is
x+y = 0
For Fig. 4. 7
(i) y = x+2
(ii) y = x–2
(iii) y = –x+2
(iv) x+2y = 6

Solution:
The points given in the figure 4.7 are (0,2), (2,0), (-1,3)
Substituting the values for x and y from these points in the equations, we get,
(i) y = x+2
(0,2) ⟹2 = 0+2
2 = 2
(2, 0) ⟹ 0= 2+2
0 ≠ 4 ————————— equation not satisfied
(-1, 3) ⟹ 3 = -1+2
3 ≠ 1 ————————— equation not satisfied
(ii) y = x–2
(0,2) ⟹ 2 = 0–2
2 ≠ -2 ————————— equation not satisfied
(2, 0) ⟹ 0 = 2–2
0= 0
(-1, 3) ⟹ 3= –1–2
3 ≠ –3 ————————— equation not satisfied
(iii) y = –x+2
(0,2) ⟹ 2 = -0+2
2 = 2
(2, 0) ⟹ 0 = -2+2
0 = 0
(-1, 3) ⟹ 3= -(-1)+2
3 = 3
(iv) x+2y = 6
(0,2) ⟹ 0+(2×2) = 6
4 ≠ 6 ————————— equation not satisfied
(2, 0) ⟹ 2+(2×0) = 6
2 ≠ 6 ————————— equation not satisfied
(-1, 3) ⟹ -1+(2×3) = 6
5 ≠ 6 ————————— equation not satisfied
Since, only equation y = –x+2satisfies all the points, the equation whose graphs are given in Fig. 4.7 is
y = –x+2
Step-by-step explanation:
okk make me brainylist okk and follow me okk