positive slope- two variables are positively related; that is when x increases, so does y and when x decreases, y decreases also.
negative slope- two variables are negatively related; that is when x increases, y decreases and when x decreases, y increases.
x-intercept- the x-coordinate of a point where a line, curve, or surface intersects the x-axis.
y-intercept- the y-coordinate of a point when a line, curve, or surface intersects the y-axis.