Question

Select the equation of a line that is perpendicular to the line on the graph and passes through the point (-1, 2)

Answer 1

The graph has 2 points
Point A: (-2, 0)
Point B: (0, -1)

Answer 2

point a because perpendicular means the opposite so therefore the opposite of the y axis will be -2

Answer 3

Y=2x+4
Y=-2x+4
Y=-1/2x+2
Y=2x-1

Answer 4

@denishays111

Answer 5

first you need to find slope of two points
(-2,0)(0,-1)
formula to find slope is \[\huge\rm \frac{ y_2 -y_1}{ x_2 -x_1 }\]
plug in y and x values

Answer 6

(-1)-0=
0-(-2)

Answer 7

So -1/2

Answer 8

yep right :=)
now perpendicular slope is negative reciprocal
for example if slope of first equation is - a/b then slope of perpendicular equation would be positive b/a

Answer 9

so what is the slope of 2nd equation ?

Answer 10

-2x?

Answer 11

Sorry 2x

Answer 12

yep right

Answer 13

So would the answer be y=2x+4

Answer 14

so equation of slope intercept form is y =mx+b
where m is slope so substitute m for 2
and pick on of order pair to plug in value of x and y solve for b

Answer 15

so how did you get A ?
and how do you know it's not D ?

Answer 16

Because when i look at the line
The y intercept must pass through (-1, 2)

Answer 17

So i thought the line would be slanted the other way

Answer 18

So its d?

Answer 19

perpendicular line passes through the point (-1,2)
so substitute x and y for (-1,2)

Answer 20

nope first one is correct i just wanted to know how did YOU get A :=)

Answer 21

Ok, thank you very much

Answer 22

my pleasure :=)