# coordinate geometry

 slope of line = y2-y1 / x2- x1 linear equation y = m (slope) x + b (y intercept) x intercept= -b/m horizontal lines have a slope of 0 vertical lines have an undefined slope lines are perpendicular is the product of their _____ equals _____ product of thier slope equals -1. midpoint formula x1 +x2/2, y1+y2/2 parabolas y=ax2 + bx + c a=slopeb= position relative to y-axisx= y intercept the a term or a parabolas a positive a term indicated the parabola opens up a negative term indicated the parabola opens down the y intercept of a parabola from a grapth you can see it, from and equation you can identify the c term. the x intercepts from a graph you can spot themfrom an equation you set the equation equal to zero and solve for x. the b term create a small chart of corresponding x and y values ... the effect of b term will be apparent from the shift of the parabola, since an equation without a b term is always symeetrical about the y axis. equations in the form x=ay2 + by +c = horizontal parabola. Authorkaytea1112 ID28715 Card Setcoordinate geometry Descriptionmore notes m Updated2010-08-02T13:44:02Z Show Answers