Answer:
the equation of the axis of symmetry is 
Step-by-step explanation:
Recall that the equation of the axis of symmetry for a parabola with vertical branches like this one, is an equation of a vertical line that passes through the very vertex of the parabola and divides it into its two symmetric branches. Such vertical line would have therefore an expression of the form:
, being that constant the very x-coordinate of the vertex.
So we use for that the fact that the x position of the vertex of a parabola of the general form:
, is given by:

which in our case becomes:

Then, the equation of the axis of symmetry for this parabola is:

The square root of Pi is approximately 1.77245.
Sonal went to school for 219 days in a full year. if her attendance is 75 percent find the number of days on which the school was open
Step-by-step explanation:
Equation of given line is:

Thus, the slope of required line is 2.