## College Algebra 7th Edition

$k(x)=-\frac{4}{5}x-2$
We are told that the slope is $-\frac{4}{5}$, so $a=-\frac{4}{5}$. We are also told that the y-intercept is $-2$, so $b=-2$. The equation must be: $k(x)=ax+b=-\frac{4}{5}x-2$