Give the equation of the horizontal line passing through (-8,9). What is its slope?

Question

I said the equation of the line is y=9. Is that correct?

I said the slope is 0. Is that correct?

Answer 1

Yes, the equation is y=9, because the line is horizontal, is at 9.

Yes, the slope is 0, because it is a horizontal line.

Answer 2

y = 9

slope = 0

We agree !

Answer 3

Yes, You are right as the slope of x should always be 0 and y = 9 here.

Answer 4

Well done!

Answer 5

Slope is 0

hmmm - you are correct on the slope but I think you would say the

The equation of a horizontal is y = b so yes y=9

Very nice!

where b is the y-intercept.

Since the slope of a horizontal line is 0, the general formula for the standard form equation , y = mx + b becomes y= 0x +b y = b. Also,since the line is horizontal, every point on that line has the exact same y value. This y-value is therefore also the y-intercept.

Answer 6

Yes, you did a great job !!  The slope of every horizontal line is zero and the equation is always written as y = ________ <== y-coordinate

you're terrific !