Question 7221
solutions/roots are "how many times does it cross/touch the x-axis (ie where y=0). Any straight line, from common sense will either have no solution (a line parallel to the x-axis) or 1 solution. The majority of lines will cross once. This answers part i.


point ii. how many points? it is a line, an infinite line. You tell me how many point there are. It is a moot point.


pointiii. "Do all the solutions"...there is just 1 solution. Think about what you are saying... the points on the line satisfy the 3x - 11y = 15 equation.


For the >= version, this says where will the left hand side be GREATER (or equal) to 15...ie everything above the line.


A graph is a visual representation of an equation. It shows where the lefthand side EQUALS the righthand side.


Jon.