Hi Fei,
The MPXV5010DP is an integrated pressure sensor so you have to use Style 2. Please note that there are also compensated pressure sensors in the same package. These devices have differential output (+Vout, -Vout) and then Style 1 is used.
So, the pin description is as follows:
1 – N/C
2 – Vs
3 – GND
4 – Vout
5 – N/C
6 – N/C
7 – N/C
8 – N/C
You can find it also in Figure 1 of the datasheet:

Best regards,
Tomas