What is the slope and y interception of the line 4x+7y=21
(Need to show work)

Question

What is the slope and y interception of the line 4x+7y=21 
(Need to show work)

jigglypuff314 · Answer

Hello @erik101 and Welcome to OpenStudy! :)

it would be easier to identify the slope and y-intercept if we had the equation in the slope intercept form
y = mx + b

so let's first try to get   y   alone on one side

subtract 4x from both sides
then divide both sides by 7

can you do that? :)

anonymous · Answer

Okay I got y=-4x+3

jigglypuff314 · Answer

close! :D

y = (-4/7) x + 3      then we have
y = m  x      + b       as the formula
where     m = slope     and     b = y-intercept

anonymous · Answer

slope -4/7x and y-intercept= 3?

jigglypuff314 · Answer

slope is the number without that x
so   slope = -4/7

but yes, that's correct! :)