Final answer:
The magnetic field created by a current-carrying wire is determined by the right hand rule; for a wire with current in the +y-direction, the magnetic field at a point on the +x-axis is into the page or screen.
Step-by-step explanation:
The question pertains to the determination of the magnetic field direction created by a current-carrying wire. According to the right hand rule 2 (RHR-2), if you point your thumb in the direction of the current (this assumes conventional current flow, from positive to negative), your fingers will curl in the direction of the magnetic field lines. Specifically, for a wire along the y-axis with current flowing in the +y-direction, at a point on the +x-axis, the magnetic field direction would be into the plane of the page or screen, represented by an 'X'. This is because as your thumb points upwards (+y), your fingers would curl into the page/screen on the right side (+x-axis) of the wire.