Question

PLZ HELP?!?
graph y=2x+3 and its inverse

Answer 1

find the y-intercept
find the x-intercept
them plug the point on the graph and connect the points

Answer 2

then find the inverse of the function
and do the same by finding the y and x intercept to graph it

Answer 3

ok...sort of following what your saying..

Answer 4

okay
first find the y intercept and tell me what you get

Answer 5

3? I'm failing and end of semester is Friday....

Answer 6

that is right
now find the x intercept

Answer 7

2?

Answer 8

well, no
to find the x intercept
set y to zero and solve for x

Answer 9

-1.5?

Answer 10

yes
0 = 2x+3 -- subtract 3 to both sides
-3 = 2x
-3/2 = x
-1.5 = x

Answer 11

now you have two points
which are
(0,3) and (-1.5,0)
plot those points on the graph and connect them

Answer 12

ok what about inverse?

Answer 13

id just do the same but subtract instead correct?

Answer 14

you have

y = 2x+3
switch the x and y
you get
x = 2y+3
now solve for y

Answer 15

so it be the same points but y is -1.5 and x=3?

Answer 16

not accurately
find the inverse first
then you will be accurate

Answer 17

but y is -1.5 right?

Answer 18

for the inverse yeah

Answer 19

ok so x is 3?

Answer 20

no
you have
y = 2x+3
switch the x and y
you get
x = 2y+3 - solve for y for inverse function
so
x = 2y+3 -- subtract 3 to both sides
x-3 = 2y -- divide by 2
(x-3)/2 = y-- the inverse
now find the intercepts