Dave receives a salary of $200 a week plus a commission of 10% of his weekly sales. an equation y = m x b represents dave’s weekly earnings. the y-intercept is dave’s base salary. the slope of the line is his commission. write an equation representing dave’s weekly earnings. a. y = negative 0.1 x minus 200 b. y = 0.1 x minus 200 c. y = negative 0.1 x 200 d. y = 0.1 x 200