1 00:00:00,000 --> 00:00:05,405 In which quadrant is the point -7, 7 located? 2 00:00:05,405 --> 00:00:08,000 So let's just review what a quadrant is 3 00:00:08,000 --> 00:00:12,287 A quadrant is each of the four sections of the coordinate plane. 4 00:00:12,287 --> 00:00:14,241 and when we talk about the sections we're talking about the sections 5 00:00:14,241 --> 00:00:16,990 as divided by the coordinate axis. 6 00:00:16,990 --> 00:00:22,252 So this right here is the x-axis, and this up down axis is the y-axis, 7 00:00:22,252 --> 00:00:25,600 and you can see it divides the coordinate plane into four sections. 8 00:00:25,600 --> 00:00:28,338 We call each of these sections quadrants 9 00:00:28,338 --> 00:00:33,021 This one over here where both the x values and y values are positive 10 00:00:33,021 --> 00:00:38,262 we call the first quadrant, and we use the roman numeral 1. 11 00:00:38,262 --> 00:00:42,464 Then if we move counterclockwise around the coordinate plane 12 00:00:42,464 --> 00:00:47,467 This quadrant, where the x values are negative and the y values are positive 13 00:00:47,467 --> 00:00:50,071 we call the second quadrant. 14 00:00:50,071 --> 00:00:54,179 We call this the second quadrant. 15 00:00:56,441 --> 00:01:01,400 Then we go down here, where both the x values are negative and the y values are negative, 16 00:01:01,400 --> 00:01:03,000 we call this the third quadrant. 17 00:01:03,000 --> 00:01:04,821 Once again using roman numerals. 18 00:01:04,821 --> 00:01:08,671 Then finally the quadrant where the x values are positive but the y values are 19 00:01:08,671 --> 00:01:11,610 negative, we call this the fourth quadrant. 20 00:01:11,610 --> 00:01:15,529 So let's see which quadrant the point -7, 7 is located. 21 00:01:15,529 --> 00:01:19,482 So there's two ways to think about it, you could just say look: We have a negative 22 00:01:19,482 --> 00:01:24,867 x value, our x value is negative, so we're gonna move to the left, we're gonna be on this side. 23 00:01:24,867 --> 00:01:28,667 We're going to be on this of the coordinate plane. 24 00:01:28,667 --> 00:01:31,446 So just by the fact that the x value is negative, we're gonna be in either 25 00:01:31,446 --> 00:01:33,518 the second or the third quadrant. 26 00:01:33,518 --> 00:01:38,867 Now we know that the y value is positive, we know that the y value is positive. 27 00:01:38,867 --> 00:01:43,067 So if the x value is negative, and the y value is positive, we're gonna land 28 00:01:43,067 --> 00:01:46,600 some place right overe here in the second quadrant. 29 00:01:46,600 --> 00:01:49,200 The other way to think about it is that you can literally just plot this point 30 00:01:49,200 --> 00:01:52,667 and see that it falls in the second quadrant, so let's do that. 31 00:01:52,667 --> 00:01:57,282 If x is negative 7, so it's negative 1. Negative 2. Negative 3. Negative 4, 32 00:01:57,282 --> 00:02:00,031 Negative 5. Negative 6. Negative 7. 33 00:02:00,031 --> 00:02:00,948 Did I do that right? 34 00:02:00,948 --> 00:02:03,764 One. Two. Three. Four. Five. Six. Seven. 35 00:02:04,179 --> 00:02:09,133 So x is negative 7, and then we have to go up 7, because y is positive 7. 36 00:02:09,133 --> 00:02:14,631 So one. Two. Three. Four. Five. Six. Seven. 37 00:02:14,631 --> 00:02:20,467 So the point -7, 7 is right over here. 38 00:02:20,467 --> 99:59:59,999 Clearly lies in the second quadrant.