You are Here: Home

# Inequalities Tweet

Maths and statistics discussion, revision, exam and homework help.

Announcements Posted on
Enter our travel-writing competition for the chance to win a Nikon 1 J3 camera 21-05-2013
IMPORTANT: You must wait until midnight (morning exams)/4.30AM (afternoon exams) to discuss Edexcel exams and until 1pm/6pm the following day for STEP and IB exams. Please read before posting, including for rules for practical and oral exams. 28-04-2013
1. Inequalities
When you plot this inequality onto a graph:

Shouldn't it be for every 1 across you go 4 up?

How come on here http://www.sci2.co.uk/fmaths/D1/D1%2...20Jan%20MS.pdf

Question 7 a) they plotted y = 4x differently?
Last edited by Kravez; 17-05-2012 at 16:35.
2. Re: Inequalities
They didn't It looks fine to me. At x=10, y=40; at x=20, y=80 etc. etc. What do you think is wrong with it?
3. Re: Inequalities
(Original post by Implication)
They didn't It looks fine to me. At x=10, y=40; at x=20, y=80 etc. etc. What do you think is wrong with it?
Look closely at (0,0). For every 1 across they are going 2 up.
4. Re: Inequalities
(Original post by Kravez)
Look closely at (0,0). For every 1 across they are going 2 up.
every 40 up, 10 across.
therefore it must be right.
5. Re: Inequalities
(Original post by Kravez)
Look closely at (0,0). For every 1 across they are going 2 up.
Look at the scale.
6. Re: Inequalities
(Original post by Kravez)
Look closely at (0,0). For every 1 across they are going 2 up.
The axes aren't scaled equally. Look again: one square on the x-axis is 1; 1 square on the y-axis is 2. Thus, going 1 SQUARE across for every 2 SQUARES up is the same as going 1 unit across for every 4 units up.
7. Re: Inequalities
(Original post by Implication)
They didn't It looks fine to me. At x=10, y=40; at x=20, y=80 etc. etc. What do you think is wrong with it?

(Original post by Kravez)
Look closely at (0,0). For every 1 across they are going 2 up.

(Original post by Pride)
every 40 up, 10 across.
therefore it must be right.

(Original post by wcp100)
Look at the scale.

(Original post by Implication)
The axes aren't scaled equally. Look again: one square on the x-axis is 1; 1 square on the y-axis is 2. Thus, going 1 SQUARE across for every 2 SQUARES up is the same as going 1 unit across for every 4 units up.
My mistake,

Thanks.