Question

за решение дам 30 балов​

Answer 1

$y = 0.4x + 3$

$x = - 2 \\ y = 0.4 \times ( - 2) + 3 = \\ - 0.8 + 3 = 2.2$

$y = - 2 \\ 0.4x + 3 = - 2 \\ 0.4x = - 2 - 3 \\ 0.4x = - 5 \\ x = - 5 \div 0.4 \\ x = - 50 \div 4 \\ x = - 12.5$

$x = 0 \\ y = 0.4 \times 0 + 3 = 3$

$y = 0 \\ 0.4x + 3 = 0 \\ 0.4x = - 3 \\ x = - 3 \div 0.4 \\ x = - 30 \div 4 \\ x = - 7.5$

$x = 5 \\ y = 0.4 \times 5 + 3 = 2 + 3 = 5$

$y = - 13 \\ 0.4x + 3 = - 13 \\ 0.4x = - 13 - 3 \\ 0.4x = - 16 \\ x = - 16 \div 0.4 \\ x = - 160 \div 4 \\ x = - 40$