Write in slope-intercept form equation of the line that passes through the given point ?

OKAY! This is really simple. Let's review the formula: y=mx + b

Here, the problem is nice so they gave you m, which is the slope. Fill it in.

1. y = -5x + b

2. y = -4x + b

3. y = 1/2x + b

Now, next, we have to find b. Let's do the first one first. The points are (3, -9). As you know, 3 = x, and -9 = y. Fill it in.

1. -9 = -5(3) + b

-9 = -15 + b

Let's isolate the b, which is the y-intercept.

Just add 15 to both sides...

6 = b

So, we know that 6 =b.

The correct answer for the first problem is y = -5x + 6.

Simple, eh?

Let's run through the other problems.

2. 8 = -4(1) + b

8 = -4 + b

12 = b

Answer: y = -4x + 12

3. -2 = 1/2(4) + b

-2 = 2 + b

-4 = b

Answer: y = 1/2x -4

Hope I helped! Pick me for best answer, please (:

slope intercept form: y=mx+b, where m is the slope and b is the y intercept(where the line crosses the y axis)

so your problem gives you everything except b so put all that in to find b: remember, points are written (x,y).

-9= -5(3)+b

multiply: -9= -15+b

add 15 to both sides. you are trying to get b on one side and what you do to one side you have to do to the other: 6=b. now you have b and m, so those are constants for your line. x and y change as the points change. final equation: y= -5x+6

now, try the others:

8= -4(1)+b

12=b so y= -4x+12

-2=1/2(4)+b

-2=2+b

b=-4 so y=1/2x-4

y=-15x+36 i think thats slope intercept form..

y=mx+b

idk i can't think of that right now it should be in your text book or just type that into google