Question

Solve the following system by using graph paper or graphing technology.

3x – 2y = 7
9x – 6y = 3

What is the solution to the system?

No Solutions

Infinite Solutions

(3, 2)

(3, –2)

Answer 1

multiply the top equation by 3 (the whole thing)
then use the elimination rule - i think

so like 9x-9x-6y+6y=...

Answer 2

no I am supposed to use graphing method.

Answer 3

oh sorry didnt see that,
well then graph the 2 lines,
if an intersection doesnt exist, that means there are no solutions
if an intersection does exist, then that menas there's one solution which is the point
if the lines are on top of each other, that means there are infinitely many solutions

Answer 4

is going to give you 0=6 which is infinitly many solution but it is the answer it does not mean it does not exists it exists.

Answer 5

no if using the elimination method 0=0 means there are infinitely many solutions
0=6 means there are no solutions, simply because 0 is not equal to 6

Answer 6

so infinite solutions?

Answer 7

graph the two lines...

Answer 8

go and download geogebra which is a fabulous free piece of software

http://www.geogebra.org/cms/

then just type in the lines to solve by graphing

Answer 9

but looking at the likes... the slopes are identical...