show that only three of the given points lie on the line y=3x-4:
(1.2,-0.4) (8.3,19.9)
(12.2, 32.6) (-3.5, -14.5)
thank you!!
2006-12-12 05:36:51 · 10 answers · asked by Anonymous in Education & Reference ➔ Homework Help
do your own homework you will learn much quicker.
2006-12-12 05:46:08 · answer #1 · answered by Anonymous · 1⤊ 2⤋
ok chris, the equation tells u that the value of "y" equals 3 times "x" minus 4.
The numbers are coordinates: 1.2 is x and -0.4 is y.
Simple arithmetic will work this out:
3 times 1.2 equals 3.6. Take away 4 equals -0.4. so the first is correct.
And to all those unhelpful idiots - this is the homework HELP section.
Continue like this and you will get the odd one out.
good luck!
2006-12-12 13:47:20 · answer #2 · answered by Allasse 5 · 1⤊ 0⤋
In each bracket you have a point described by its x and y coordinates - i.e. (x,y) Just put the value of 'x' into your equation in each case and calculate 'y' using the equation and you will find one of the pairs of numbers does not tally. (Answer at bottom of page),
(Any two coordinates describe a point on a line appertaining to that equation - so it's not too difficult if you just do the simple sum)
Answer: (8.3,19.9) is not on the line
(you'll still need to do the simple sum to show this is the case though...but that's not too tough!)
2006-12-12 13:48:53 · answer #3 · answered by helmut cheez 3 · 1⤊ 0⤋
Try www.homeworkelephant.co.uk -and HomeWork Elephant - Maths
HomeWork help - Hundreds of sites to help you with Maths ... Check out what you should be covering in your key stage 3 and 4 Maths course. HomeWork Elephant Mailing List ...www.gregreeve.freeola.com/math-home.shtml -
2006-12-12 13:53:57 · answer #4 · answered by tagette 5 · 0⤊ 0⤋
substitute the x coordinate and y coordinate and check if the right side equal to the left , than count 1 point.
2006-12-16 08:56:28 · answer #5 · answered by huong a 1 · 0⤊ 0⤋
I know how to, but you need to show the answer on a graph, so I can't answer the question for you. Sorry!
2006-12-12 13:45:46 · answer #6 · answered by hawaiian_shorts91 3 · 0⤊ 1⤋
Why all the maths problems on here tonight?
2006-12-12 13:40:01 · answer #7 · answered by Anonymous · 1⤊ 2⤋
you need graph paper dear
2006-12-12 13:47:13 · answer #8 · answered by potato 3 · 0⤊ 1⤋
sorry, this is not a homework club!!
2006-12-12 13:47:06 · answer #9 · answered by captain jack 4 · 0⤊ 2⤋
Sorry.... you've got me!!!????
2006-12-12 13:45:07 · answer #10 · answered by Anonymous · 0⤊ 2⤋