### I am attempting to calculate the Mbps of an IO graph. The y axis appears to jump to 1*10^6 after 999,999 bytes. Why is the exponent a 6?

I am attempting to calculate the Mbps of an IO graph. The y axis appears to jump to 1*10^6 after 999,999 bytes. Why is the exponent a 6? After another million bytes the exponent goes to a 7. I feel that I am calculating something wrong. According to my graph the peak Bytes per second is around 6*10^7 from the 4 second mark to the 6 second mark. I am calculating this to be 60,000,000 Bytes. I then divide that by 125,000 to get 480 Mbps. Is this correct? I feel the exponents are throwing me off and questioning if I am interrupting the y axis correctly.

Thanks