Question

i need help!.... Write the equation of the line which passes through (4, –2) and is perpendicular to the line with equation 2y – x = 1.

Answer 1

First solve for y


\[\Large 2y – x = 1\]


\[\Large 2y = x + 1\]


\[\Large y = \frac{x + 1}{2}\]


\[\Large y = \frac{1}{2}x + \frac{1}{2}\]


What is the slope in that last equation above?

Answer 2

x + 2y = 2 ??

Answer 3

no, that's not the final answer

Answer 4

2x - y = 4 ???

Answer 5

still no

Answer 6

x - 2y =6

Answer 7

that line is parallel and not perpendicular to the given one

Answer 8

so 2x + y = 6

Answer 9

you got it

Answer 10

any way of tellin if this is true or false?

Answer 11

What is this asking or making a statement about?

Answer 12

I just see a table, but no statement. So what is it saying true or false about?

Answer 13

it only asks if the table is t or f ..??

Answer 14

is this the whole question?

Answer 15

sorry the statement above says, "the table below does not dfine a funciton" t or f ??

Answer 16

what do you think

Answer 17

are there any cases where an x value maps to more than one y value?

Answer 18

i said true

Answer 19

why don't you think it's a function?

Answer 20

because x values match to more than one y??

Answer 21

or some x's do

Answer 22

are there any cases where one x value maps to more than one y value?

Answer 23

yes, to the 1

Answer 24

no, you're looking at it backwards from what I'm asking

Answer 25

ohhhh sorry, that is the range.. then it would be no

Answer 26

each x maps to only one y value

Answer 27

you don't have x = 1 for example mapping to two different things (say y = -1 and y = 0). It only maps to one thing and that is y = -1

Answer 28

so the table is true, it is a function

Answer 29

It is a function

Answer 30

or excuse me, false because it it is a function

Answer 31

The original statement was "the table below does not define a function"

Answer 32

So the original statement is false

Answer 33

right, thanks!

Answer 34

yw