\[\boxed{\text{229\ (229).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[y = 0,4x - 2\ (прямая)\]
\[x\] | \[2\] | \[0\] | \[- 2,5\] | \[7\] |
---|---|---|---|---|
\[y\] | \[- 1,2\ \] | \[- 2\] | \[- 3\] | \[0,8\] |
\[y = 0,4 \cdot 2 - 2 =\]
\[= 0,8 - 2 = - 1,2\]
\[0,4x - 2 = - 2\]
\[0,4x = 0\]
\[x = 0.\]
\[y = - 0,4 \cdot 2,5 - 2 = - 3\]
\[0,4x - 2 = 0,8\]
\[0,4x = 2,8\]
\[x = 7.\ \]