Final answer:
The rate of change in the equation y=8x+6 is the slope, which is 8. This means for every one unit increase in x, y increases by 8 units.
Step-by-step explanation:
The rate of change in the equation y = 8x + 6 refers to the slope of the line, which in this case is 8. This is consistent with the general format of a linear equation y = mx + b, where m represents the slope and b represents the y-intercept. The slope indicates that for every unit increase in x, the value of y increases by 8 units.