Question

solve the system of equations by graphing, f(x)=-1/2x +2 g(x)=9/2x -8

Answer 1

ok

Answer 2

let me see

Answer 3

someone please help me

Answer 4

but its pretty simple

Answer 5

not for me i really suck at math, please help me step by step

Answer 6

is this correct
f(x) = -(1/2)x + 2
f(x) = (9/2)x - 8

Answer 7

not sure how to make the fraction symbols for -1/8 and 9/2

Answer 8

thats ok me neither.
both of these are linear of the form y = mx+b
m = slope (rise/run)
b = y-intercept (where it crosses y-axis)
Now we need to graph each one
First identify y-intercept for our first point
1) b = 2
2) b = -8
put these points on the graph on the y-axis

Answer 9

Next we look at slope to find second point
1) m = -1/2
This means starting at our y-intercept we go down 1 and over to right 2, repeat process for additional points
2) m=9/2
This means starting at y-intercept go up 9 and over to right 2

connect points to make each line
point where they intersect is the solution

Answer 10

in the begining the first points b=2 b=-8 is that graphed as (2,-8)?

Answer 11

oh sorry i meant 1) to mean line 1 and 2) to mean line 2
they are separate points
the x value is always zero for the y-intercept
(0,2) (0,-8)

Answer 12

ok im really bad at this stuff

Answer 13

when you think y-intercept, think y-axis....points will be directly on y-axis

Answer 14

ok, so back to m=-1/2 and m=9/2

Answer 15

yes start with the first one
go to starting point (0,2)
-1 means go down 1
2 means go right 2
plot a point

Answer 16

ok so after i graphed them i came up with (2,1)?

Answer 17

correct
this is the point where they cross

Answer 18

ok do u have time to help me with more

Answer 19

for a little bit, if nothing else i'll give you the steps

Answer 20

ok f(x)=-1/8x-3 g(x)=5/8x-9

Answer 21

same thing solve by graphing

Answer 22

do the exact same steps we did before
the only thing that changes is the slope and y-intercept

Answer 23

for f(x) = mx + b
m=-1/8
b=-3

Answer 24

can you graph the first point from there

Answer 25

start at 0 and go down the y to -3

Answer 26

good

Answer 27

same for (0,-8)

Answer 28

they intercept at (2,-3) is that correct?

Answer 29

careful the -8 was part of the slope for the first line

Answer 30

the other y-intercept would be (0,-9)

Answer 31

right , after i graphed them i got (2,-3)

Answer 32

remember what the difference between m and b are
another way to think of it is the slope is always the number associated with the x, y-intercept is always the constant value

Answer 33

no you should get (8,-4)

Answer 34

starting at (0,-3)
go down 1
over right 8

Answer 35

ok i got it

Answer 36

ok good
keep repeating those steps
gotta go
good luck

Answer 37

thank you so much

Answer 38

your welcome

Answer 39

thank you so much