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The first number in an ordered pair is always called the ycoordinate and the second number is always called the xcoordinate?
This is a statement; it is not a question.
What value of y in math?
Y is just a variable. It depends how it is used.5y-15=30 well y=9In a graph you have (X,Y) coordinates also know as an ordered pair.Standard Form Ax + By = C where A and B are not both equal to zero, A, B, and C are integers whose greatest common factor is 1, and A is nonnegative (if zero, B must be positive). The standard form can be converted to the general form, but not always to all the other forms if A or B is zero.Slope intercept form y= m x+b where m is the slope of the line and b is the y-intercept, which is the y-coordinate of the point where the line crosses the y axis.Point Slope Form y-y1=m(x-x1) where m is the slope of the line and (x1,y1) is any point on the line.The point-slope form expresses the fact that the difference in the y coordinate between two points on a line (that is, y− y1) is proportional to the difference in the xcoordinate (that is, x − x1). The proportionality constant is m (the slope of the line).Functions where y = f ( x ) this is for mapping data A function is a relation (usually an equation) in which no two ordered pairs have the same x-coordinate when graphed.All depends on how the Y is being used and Y can be used many ways.
How do you find the slope on a line graph?
Y-intercept Form From the formula y = mx + bThe y-coordinate of a point on the line equals the product of the slope of the line and the corresponding x-coordinate plus the y-intercept (the vertical line that runs through the point).y - b = mxm = y-b/xCoordinate PointsThe slope of a line can be seen visually and computed from the change between coordinates: the distance along the Y-axis divided by the distance along the X-axis, also known as the "rise over run." You can find the slope by finding whole-number coordinates for points that the line passes through. For a straight line, the slope of any segment is the slope of the line as a whole.The formula is m= Δy/Δxor m = (y1 - y2) / (x1 - x2)- Find the Y-difference between the two points by subtracting the second from the first.- Find the X-difference between the two points by subtracting the second from the first.- Divide the Y-change by the X-change (one or both may be negative)The slope will be the Y-change divided by the X-change. It is a positive slope for an upward slanting line, and a negative slope for a downward slanting line, as seen moving from left to right.Rise over RunThe process is the same, except that you subtract the leftmost, lower X value from the larger X value to create a positive "run" number. Then you subtract the Y value of the leftmost point from the Y value of the rightmost point, giving you a "rise" that may be positive or negative.Examples:1) Finding the slope for a line that runs through the points (2,1) and (5,7). Start at the leftmost point and move right until you reach the other point. In this case, you should move across 3 spaces. So 3 is your "run." At the same time you are moving right, the Y value increases from 1 to 7. This is 6 and is your "rise."Divide the Y-change by the X-change, rise over run, to get 6/3 or a slope of +2.2) Finding the slope for a line that runs through the points (2,1) and (4, -3). Start at the leftmost point and move right until you reach the other point. In this case, you should move across 2 spaces. So 2 is your "run." At the same time you are moving right, the Y value decreases from 1 to -3. This is a drop of 4, or a "rise" (fall) of -4.Divide the Y-change by the X-change, rise over run, to get -4/2 or a slope of -2.As above, an upward slanting line has a positive slope, and a downward slanting line has a negative slope.
