A4 Premica odreže na ordinatni osi odsek -5, s pozitivno smerjo abscisne osi oklepa kot $45^{\circ}$. Njena enačba je:
(A) $x=-5$
(B) $y=-x-5$
(C) $y=x-5$
(D) $y=-5 x$
(E) nič od navedenega

The line intersects the ordinate axis at -5 and makes an angle of $45^{\circ}$ with the positive direction of the abscissa axis. Its equation is:
(A) $x=-5$
(B) $y=-x-5$
(C) $y=x-5$
(D) $y=-5 x$
(E) none of the above
A4. The intercept on the ordinate axis means that $n=-5$. The slope angle of the line is $\tan \alpha=k$, so $k=\tan 45^{\circ}$, which means $k=1$. The equation of the line is therefore $y=x-5$.