The x-axis is the time worked in hours, the y-axis is the amount of $ earned.
Slope is the constant rate of change. It is a certain amount of $ earned for a certain number of hours. So as the the number of hours you work increases, the amount of money you earn also increases.
Rise is the number of units you go up or down (y)
Run is the number of units you go to the right (x)
Basically, your answer is B.