When you see how easy this is, you'll smack yourself upside the head.
Take #60. Those are two lines.
-- One line is x=-5 . That's a vertical line that crosses the x-axis where x=-5, and EVERY POINT on it is at x=-5 no matter what 'y' is at that point.
-- The other line is y=2 . That's a horizontal line that crosses the y-axis where y=2, and EVERY POINT on it is at y=2 no matter what 'x' is at that point.
So you have the intersection of two lines. On one of them, 'x' is always -5. On the other one, 'y' is always 2 . Now what do you suppose the coordinates will be at the point where they cross ? Could it possibly be anything different from (-5, 2) ? ?
In #62: On the first line, 'y' is always -6. On the other line, 'x' is always 1. They MUST intersect at (1, -6) .
In #64: On one line, 'y' is always -1. On the other line, 'x' is always zero. (The line where 'x' is always zero happens to be the y-axis.) I'm SURE that by now you know where these two lines intersect.
You don't even have to graph any of these to know where they intersect !
You can just look at the problem and the coordinate pair jumps out at you.
To find the coordinate pairs of the intersecting points, identify the equations corresponding to each question. Calculate their intersection points by setting their equations equal to each other and solving for x and y. This process allows you to determine the points where the given lines or curves cross each other.
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