Question

запоните таблицы и постройте график ​

Answer 1

1.

$y = - 2.5x \\ y = - 10 \\ - 10 = - 2.5x \\ - 2.5x = - 10 \\ x = - 10 \div ( - 2.5) \\ x = 4$

2.

$y = 1 \times \frac{1}{2} x \\ x = 4 \\ y = 1 \times \frac{1}{2} \times 4 \\ y = \frac{4}{2} \\ y = 2$

3.

$y = 3.5x \\ y = - 3.5 \\ - 3.5 = 3.5x \\ 3.5 = - 3.5x \\ - 3.5x = 3.5 \\ x = 3.5 \div ( - 3.5) \\ x = - 1$

4.

$y = - 3 \times \frac{5}{10}x \\ x = 2 \\ y = - 3 \times \frac{5}{10} \times 2 \\ y = - \frac{30}{10} \\ y = - 3$