Please help me. I am in dire need of assistance. I don't know how to change fractions such as 1/7 in a quadratic function. The problem is like this:

y= (-7x^2)+2x

The directions are as follows:

Complete these steps for a function.

a)Tell whether the graph of a function opens up or down.

b)Find the coordinates of the vertex.

c)Write an equation of the axis of symmetry.

For my equation of the axis of symmetry, I got:

-2/2(7)=-2/-14=-1/-7=1/7

Please explain the next step.

Do I round the decimal?

Do I leave 1/7 as a fraction?

HELP!!!!!!!!!!!!!