I need help with my algebra homework! please?

Question

Q: determine whether the lines are perpendicular.

y=x-2, y=-x+4


please!!!!!! i dont get this stuff!!

Answer 1

Perpendicular since the slopes are negative reciprocals (1 and -1)

Answer 2

These 2 equations are in slope intercept form: y = mx + b
y = 1x - 2 so the slope = 1
y = -1x + 4 so the slope = -1

If lines are parallel, their slopes are equal. These lines are NOT parallel.

If lines are perpendicular, their slopes multiply to give -1. These 2 slopes: 1 * (-1) = -1. So these 2 lines are perpendicular.

Hope that helps!

Answer 3

y=mx+b. m is the slope of the line. b is the y intercept point.
m = 1 in the first one and m= -1 in the second one. Looks perpendicular.

Answer 4

if the two lines are perpendicular, then the product of the two rates would give -1. here, they are. 1*-1=-1

Answer 5

the product of the slopes of two perpendicular lines is -1.

Answer 6

When you have 2 lines of equations
(l1) : y=a1*x+b1
(l2): y=a2*x+b2
then if a1*a2= -1 then they are perpendicular

So in your case, a1=1 and a2= -1
As a1*a2= -1, they are perpendicular

Answer 7

y=x-2; m=1



y=-x+4; m=-1

since 1=-1/(-1), they are perpindicular.

Answer 8

go to the tutoring center at school, or ask your teacher for help. this is real real basic level algebra and it only gets harder from this point on. if you do not grasp the basic concepts you will not pass.

Answer 9

Yes, they are due to the fact that if you multiply the slopes together the answer is -1.

Answer 10

yes, they are perpendicular.

slope of 1st equation is 1
slope of 2nd equation is -1
product of slopes is -1

if product of slopes is -1, lines are perpendicular.