10,000,000+2,000,000+400,000+30,000
Dependent variable is the variable that changes due to the independent variable, independent variable is the variable that scientists change on purpose.
Line y=mx+b has point (0,b).
If you've got poind (0,4) - you can write, that b=4.
So this is line y=mx+4
Now slope. You've got point (1,0), so for x=1, y=0. Substitute:
m * 1 + 4 = 0
m+4 = 0
m=-4
So equation of this line is: y=-4x+4
