coordinate geometry

= y2-y1 / x2- x1

y = m (slope) x + b (y intercept)

-b/m

0

have an undefined slope

product of thier slope equals -1.

x1 +x2/2, y1+y2/2

y=ax² + bx + c

• a=slope
• b= position relative to y-axis
• x= y intercept

• a positive a term indicated the parabola opens up
• a negative term indicated the parabola opens down

• from a grapth you can see it,
• from and equation you can identify the c term.

• from a graph you can spot them
• from an equation you set the equation equal to zero and solve for x.

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.