what is the intercept of the line given by the equation below? Enter your answer as an ordered pair

Question

anonymous · Answer

@CalebBeavers

anonymous · Answer

@timo86m  Is it 8?

anonymous · Answer

@jim_thompson5910 :)

anonymous · Answer

Hint
y=mx+b

jim_thompson5910 · Answer

y = -x+72 is in the form y = mx+b where m = -1 and b = 72

So what do you think the y-intercept is now?

anonymous · Answer

72? :) @jim_thompson5910

jim_thompson5910 · Answer

you nailed it

anonymous · Answer

-72

jim_thompson5910 · Answer

in general

y = mx+b is your line

and it has a y-intercept of b

ie the point (0, b)

anonymous · Answer

but dont forget it is in ordered pair

jim_thompson5910 · Answer

yes good catch, don't forget that it's really the point (0, 72)

jim_thompson5910 · Answer

but you can use shorthand notation to just say 72, depends on the book really

anonymous · Answer

Oh okay! Lol yeah so All you do really is the intercept B by -1 right? :) @jim_thompson5910 @timo86m

jim_thompson5910 · Answer

the slope is -1 because m = -1

compare 

y = -1x + 72

to

y = mx+b

and you'll see m and -1 matching, which means m = -1

Similarly, b = 72 because they line up as well