Two points on a parabola are (-3,5) and (11,5). What is the equation of the axis of symmetry?

ProffesorNobody May 30, 2019

#1**+2 **

The axis of symmetry will be found by adding the x coordinates of these points and dividing by 2......so

x = [ -3 + 11] / 2

x = [ 8 ] / 2

x = 4 ⇒ axis of symmetry

CPhill May 30, 2019

#2

#5**+1 **

This parabola opens upward

The axis of symmetry for a parabola that opens upward (or downward ) will always be the average of the two x values whenever those two x values are associated with the same y value

Thus...to find the average....add the x values and divide by 2

CPhill
May 30, 2019