Question

Find a real number,K , such that the line 20x + ky-12= 0 has y -intercept -19 .

Answer 1

\[0=20x+ky-12\]
sub in the yintercept (0,-19)
\[0=20(0)+k(-19)-12\]
\[0=-19k-12\]
\[12=-19k\]
\[k=\frac{ 12 }{ -19 }\]