book Maths Puzzle Numerical Ability

He is the question below. I need to define the variable for x and y, write the appropriate equations, and solve the equation by either substitution, addition, or graphically. We we

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Hi. Here is my question:

Given three collinear points A,B,C, four different rays can be named using these points, AB,BA,BC and CB. How many different rays can be named given 5 collinear points?

Thanks! solve the system graphically: y = 2x - 3
y = 3x - 5

If two linear equations graph as intersecting lines, they are called { } equations.