y = 4x + 5
0 ≤ x ≤ 15
4*0 ≤ 4*x ≤ 4*15
0 ≤ 4x ≤ 60
0 + 5 ≤ 4x + 5 ≤ 60 + 5
5 ≤ 4x + 5 ≤ 65
E(y) = [5, 65] первое
Е(у)= [5;65]
100% правильно, сама проверяла
y = 4x + 5
0 ≤ x ≤ 15
4*0 ≤ 4*x ≤ 4*15
0 ≤ 4x ≤ 60
0 + 5 ≤ 4x + 5 ≤ 60 + 5
5 ≤ 4x + 5 ≤ 65
E(y) = [5, 65] первое
Е(у)= [5;65]
100% правильно, сама проверяла