Question

What is the equation of a horizontal line passing through the point (-3, 8)?
b. y = 8
c. x = 5
d. y = -11

Answer 1

@phi How do I do this one

Answer 2

y = 8

Answer 3

Yeah but I wanna know how you got there

Answer 4

@sourwing @phi

Answer 5

a horizontal line goes sideways (not up or down) y measures up or down

if a horizontal line goes through (-3, 8) its y value is 8 (2nd number)
because it is horizontal its y value never changes. y=8

if you think of this in slope intercept form
y= mx + b
b is 8 and m is 0 (slope is 0)
y = 0*x + 8
or just
y= 8

Answer 6

all horizontal lines are of the form y = k where k is some number

to make sure that y = k goes through (-3,8), k must be 8 since this is the y coordinate of the given point

So that's why the answer is y = 8

Answer 7

basically, every point on y = 8 is a point of the form (x,8)

x is any number and the y coordinate is fixed to be 8

Answer 8

The vertical line is the same way, but in the form x= number

Answer 9

Oh....well I feel extremely stupid now

Answer 10

people are not born knowing this