2Two number lines that intersect at right angles form a coordinate plane. The horizontal axis is the x-axis and the vertical axis is the y-axis.The axes intersect at the origin and divide the coordinate plane into four quadrants
6An ordered pair of number identifies the location of a point These number are the coordinates of the point on the graphIn the ordered pair (4,2), the first number 4 is called the x-coordinate (abscissa). The second number 2 in the ordered pair is called the y-coordinate (ordinate).
7A scatter plot is the graph that relates two group of data. A Trend line on a scatter plot shows a correlation more clearly
8Positive correlation - both sets increase together Negative correlation - one set increases while the other decreaseNo correlation – data is not related