Ответ:

1) y = 1,5x - 20

0 = 1,5x - 20

20 = 1,5x

[tex]x = \frac{20}{1.5} = \frac{200}{15} = \frac{40}{3} = 13 \frac{1}{3} [/tex]

(13 1/3; 0)

y = 1,5 · 0 - 20

y = -20

(0; -20)

2) y = 5 - 1/4x

0 = 5 - 1/4x

-5 = -1,4x

x = 20

(20; 0)

y = 5 - 1/4 · 0

y = 5

(0; 5)