Question

Need help studying for finals.
Find x- and y0 intercepts. then graph equation.
-2x-4y=4

Answer 1

first solve for y which is 4y=-2x-4 and y = (-1/2)x - 1; now to find y intercept let x=0 so y=-1, to find x intercept let y=0 s x =-2

Answer 2

http://www.purplemath.com/modules/intrcept.htm

Answer 3

y-intercepts
set the x = 0
x-intercepts
set y = 0

Answer 4

I recommend solving for y, then doing a table of values where you sub
-100, -10, -5, -3, 0, 3, 5, 100 into x, and then graph the y values

you graph -100 to see if the graph is decreasing or increasing to infinity

Answer 5

it really is just information of where the graph is going that is why you do the larger points, although it is a very inaccurate method

Answer 6

Just sit down and look at the equation when you get to the test and ask yourself, "what is an x or y intercept?" Because that's just where a the graph intercepts the x or y axis! How could you get a point to intercept the x or y axis? Well, lets just take a look at this graph:



Where is it intercepting the x-axis? Well, just look at it, it's got 2 points where it's hitting, and you can see that y=0. So in your equation just plug in 0 for y and solve for your x values, remember that when you take the square root of something you'll get a positive and negative number since -2 x -2 is 4 just like 2 x 2 is 4.

Similarly, your y-intercept is just when your x=0, so just plug and solve for y! It's really that easy.

When graphing an equation, just plug in a number like 0 for x, then find out what y is so you can see how far up and down to go. If you have your x and y intercepts graphed, you can usually just make a good guess of what the rest of the graph will look like from this: