Question

@texaschic101
I will post a image.

Answer 1

substitution

y = 8x - 9
y = 4x - 1

says their both equal..so set them equal
8x - 9 = 4x - 1
8x - 4x = -1 + 9
4x = 8
x = 2

now sub 2 in for x in either of your original equations
y = 8x - 9
y = 8(2) - 9
y = 16 - 9
y = 7

so your solution is : (2,7)
and your solution is where your lines intersect.

Do you understand what I just did ? Do you have any questions at all ? If so, ask them now.

Answer 2

I do not have any for this question but there is one more question I need answered and ill be good :)

Answer 3

ok....ask away

Answer 4

In y = mx + b form, the m is the slope and the b is the y intercept.
y = 2x - 1......slope is 2 and y int is -1
y = 4x - 5...slope is 4 and y int is -5

for the first....y = 2x - 1.....start at your y int (0,-1).....and since the slope is 2...you go up 2 and to the right 1, and up 2, and to the right 1...
to find the x int, sub in 0 for y
0 = 2x - 1
-2x = -1
x = 1/2.....so your x int is (1/2,0)....this is where your line will cross the x int.

for the second one...y = 4x - 5...start at your y int (0,-5)....and since the slope is 4, you go up 4 and to the right 1, and up 4, and to the right 1
to find the x int, sub in 0 for y
0 = 4x - 5
-4x = -5
x = 5/4.....so your x int is (5/4,0)....this is where the line crosses the x int.

2x - 1 = 4x - 5
2x - 4x = -5 + 1
-2x = -4
x = 2

y = 2x - 1
y = 2(2) - 1
y = 4 - 1
y = 3

and your lines should cross at (2,3)

Answer 5

sorry...but I am not the best at graphing...can do it algebraically better...lol

Answer 6

Once again thanks so much for your help I have fanned and medal you for your awesome help, you are the best! ("\(=^_^=)

Answer 7

I am happy to help when I can :) I just hope I didn't confuse you too much

Answer 8

no you didn't XD