Question

Match the equation with its graph. –4x – 2y = 8

Answer 1

Well we can make this easier..by turning this equation into slope intercept form

The form is

y = mx + b
where 'm' is slope
and
'b' is y-intercept...so we need to solve your equation for 'y'

-4x - 2y = 8

Start by adding 4x to both sides

-2y = 4x + 8

and now divide EVERYTHING by -2 to isolate 'y'

y = -2x - 4

So which of YOUR graphs...has slope -2 and y-intercept -4?

Answer 2

find the x and y intercepts:

-4(0)-2y=8
y = -4
(0,-4)

-4x-2(0) = 8
-4x=8
x=-2
(-2,0)

find the graph that goes through those two points.

Answer 3

come on, you need to be able to read a graph! look for the one where the line goes through the points (-2,0) and (0,-4). Or look for the one that falls 2 points for every point you go to the right, and intersects the y-axis at -4.

Answer 4

got it

Answer 5

What are the slope and y-intercept of the graph of the given equation?


y = –4x + 2

Answer 6

put it in slope-intercept form: \[y=mx+b\]then \(m\) is slope and \(b\) is y-intercept