Answer
$a)$
$y=-7$
$b)$
$m=0$ and $b=-7$
$c)$
Work Step by Step
$4y+28=0$
The slope-intercept form of the equation of a line $y=mx+b$, where $m$ is the slope of the line and $b$ is its $y$-intercept.
$a)$
$4y+28=0$
Take $28$ to the right side:
$4y=-28$
Take the $4$ to divide the right side:
$y=-\dfrac{28}{4}$
$y=-7$
The equation is now in slope-intercept form.
$b)$
Comparing the obtained equation to the slope-intercept form of the equation of a line shown at the top, it can be seen that $m=0$ and $b=-7$
The slope of the given line $m=0$ and its $y$-intercept is $(0,-7)$
$c)$
The graph is shown below:
