I think 6 4/5 I’m not sure
The answer is x=12
y=-x would be a negative slope
y=12 would be a horizontal line because you can put any point on that line and it's y would always be 12 but it's x coordinate can be anything else
x=y is a positive slope
x=12 is a vertical line because you can put any point on that line and it's x coordinate would always be 12 but its y coordinate can be anything else
There are many answers to this, but one answer might be to take away 6 of the other colors. This is because if 12 marbles are to equal 50%, we need the other side to have the same amount of marbles as the blue. And since the other color marbles add up to 18 and not 12, we need to take away six of the other colored marbles to make it 12.
I hope I helped, and if you need more information, please feel free to tell me! :D
Y-y1= m(x-x1) point-slope form
y-0= -3(x-5)
solve this point-slope form to slope-intercept form. Use the information to graph the line.