how do you graph Y=-3x-4??

Question

how do you graph y=-3x-4

Answer 1

Simple

Assume a Value of x And put this in the equation above to get the value of y
now plot the point (x,y) on the graph

e.g. Lets assume x=1

then y= -3x -4
=> y = -3(1) - 4
= -3-4
= -7
so plot point (1,-7)

also as this is a linear equation it represents a st line
And any st. line can be defined by only two points

So, now assume x = 2 or -1 (any value you want lets say -1)
thus x=-1

put in the equation to get y

y = -3x -4
= -3*(-1) -4
= 3-4
= -1
so point is (-1,-1)

Now plot the points P1(1,-7) and P2(-1,-1)

And join the two points (P1 & P2) and you get your graph for the equation .

Answer 2

Graph 3x 4

Answer 3

Y 3x-4 Graph

Answer 4

you could do it a lot of ways but the slope intersect is what i think is the easiest
the equation is y=mx + b with m as the slope and b as the y intercept. I no it doesn't make much sense since y should equal the intercept but believe me it works!I could give you a proof but u dont need it.
first graph -4 on the y axis
next put -3 over 1 and that tells you to go down 3 and over to the positive side once. that give you other points.
next draw a straight line over these points and voila!
:)

Answer 5

When x = 0, y = -4, so put a dot on the y axis at -4. That's the y-intercept. The slope is -3, so starting from your dot at (0,-4), go down (-) 3 and right 1. Make a dot there (should be (1,-7) ), and draw a line through the 2 dots. Top of slope fraction tells you how far up or down to go, bottom tells you how far right (always) to go.

Answer 6

start at -4 on the y-axis. then go up 3 and left 1 repeatedly. If you run out of room on your graph paper you can go down 3 and right 1. You should create a straight line.

Answer 7

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y=4-3x first u plot the point (0,4)since 4 should be on the y axis when x is 0. then the gradient is -3/1, right? so from the point (0,4), you move 3 units downwards and 1 unit to the right and get the new point. then you join the point (0,4) to the new point and you get the graph. try it. it works and also it is an easier and faster method

Answer 8

go by the formula y=mx+b
m = the gradient (or slope) - do u know of "rise over run"
b = the y intercept

so with your question...
y = -3x - 4

the gradient is -3
so the line will have a negative slope, and go up 3 for every 1 across to the left. (3/1 = rise/run)

the y intercept is -4
so the line will cut the y axis at -4

hope this helps

just remember the formula and what it means and u cant go wrong =]

Answer 9

Like what, on a graphing calculator? Or by hand?
It's pretty easy, really... on a graphing calc, just plug it right in.

If by hand, then pick points for x.

Ex:
x=0, y=-4
x=1, y=-7

Graph the points, then draw a smooth line that connects all the points.

Answer 10

Start at (0,-4) and move 3 down and 1 right since slope = -3/1.