Question

If you answer these i'll become a fan of you and give you a medal! Only 3 questions.(:

Solve each system by graphing? Need some help. :(

1.) y = -x + 1
y= 3x + 12

2.) y += 1.5x + 2
4.5x - 3y = -9

3.) y = x + 1
2x - 2y = -2

Answer 1

Okay well for that first one...

y = -x + 1
y= 3x + 12

you have 2 equations in slope intercept form

y = mx + b
where m = slope and b = y-intercept...

Answer 2

for y = -x + 1

it crosses the y-axis at 1...and goes down 1 and over to the right 1 everytime...



like that...

Answer 3

Now for y= 3x + 12

it crosses the y-axis at 12...and goes up 3 and over to the right 1 each time...so...something like

Answer 4

what you want is to find where they meet...

Answer 5

if you throw these 2 equations in a graphing calculator...you will see they intersect when x = -2.75

make sense?

Answer 6

Now for the other 2 questions...there will be an extra step...because you want the equations in the form

y = mx + b

So we need to make them look like that...

Answer 7

I understand all of these but how would i type out all these answers?

Answer 8

how would you type them out? I'm not too sure what you mean...

Can't really type a graph so maybe they just want the point where they intersect?

like for the first one...they intersect at x = -2.75 and y = 3.75

Answer 9

thats what meant! haha what are the other two?

Answer 10

-_- lol well then good! haha...okay lets figure out the other 2...

Answer 11

alright!