Recently, a stock split and the value per share increased. Three days after A Price of Stock ($) the stock split, the stock was valued at $20 per share. Eighteen days after O 100- the stock split, the stock was valued at $80 per share. The equation 4x - y = - 8 models the relationship between the stock's per share value y O and the number of days x since the stock split. Use the equation to complete parts a) through d) below. 8 a) Estimate the slope from the graph. 25- (3 20 Days (Round to the nearest integer as needed.) 10 & 30