Question

Three quick questions please?!

A. Graph y = 3x + 1 on the graph paper
provided.

B. Write an equation for the line parallel to the line in part (A) that passes through (2,0).
SHOW or EXPLAIN ALL WORK! (6 pts)

C. Write an equation of the perpendicular to y = 3x + 1 passing through (0, -4)
SHOW or EXPLAIN ALL WORK!
http://i58.tinypic.com/rc389f.png

I've been stuck on this for almost a week now. I'm trying so hard to learn how to do this but I can't. Math is my worse subject. Can someone please help me. I beg. I will fan and everything else. Please

Answer 1

For the first one, pick some values for x and y and then you can graph it... about 3-5 points

Answer 2

I've done letter A and C I need B now.

Answer 3

OK, you need to find the slope for the equation in part A before you can find an equation of a line that passes through that point

Answer 4

You want to use the equation y = mx + b

Answer 5

y = 3x - 6 ??

Answer 6

Plug in 0 for y and 2 for x and solve for b, so you have 0 = 3(2) + 1

Answer 7

Wait what. I'm so confused. How do we break this down and get the entire answer? Can you please show me.

Answer 8

Step 1) Substitute the slope from original line (3 in this case) into the equation of the line y = 3x +b
Step 2) Substitute the given point (1,7) into the x and y values 7 = 3(1) +b
Step 3) Solve for b (the y-intercept) work
Step 4) Substitute this value for 'b' in the slope intercept form equation y = 3x + 4

Answer 9

Those are the steps to get your equation

Answer 10

You want to change the values as that is an example

Answer 11

So the answer is not y=3x-6?

Answer 12

The answer I get is 3x + 6

Answer 13

You don't need to change the sign

Answer 14

Okay I see

Answer 15

I still don't know how to do this for some reason I need to show my work

Answer 16

Oh wait, actually b is -6 when you solve

Answer 17

To show your work, you want to plug in 0 for y and 2 for x and solve for b, it will look like 0 = 3(2) + b

Answer 18

Subtract 6 from both sides to isolate the b and you get b = -6, plug that back into the original equation and your line that is parallel is y = 3x - 6

Answer 19

Hopefully you got all of that

Answer 20

@Don_n

Answer 21

Wait I think I just got it. Finally!

Answer 22

If you need to find a line that is parallel, remember that what you are looking for is a line with the same slope

Answer 23

0=3(2)+b
-6 -6
-6 = b Is there anything I'm missing?

Answer 24

that would be it

Answer 25

So that's the answer to the problem and I'm done? Or do I need to do something else?

Answer 26

except that you want to show the rest of the work, 0 = 6 + b and then subtract 6 from both sides and you end up with -6 = b

Answer 27

but that is the answer to the problem

Answer 28

Oh Okay. I see! Thank you so much. No one else would help me when I asked them on here. Thanks so much I'm fanning you and stuff.

Answer 29

Thanks. If I'm online, feel free to tag me for help :)

Answer 30

If you are done, don't forget to close the question

Answer 31

Okay. Thanks again :')