Please help!!!
Word Problem:
Sammi just started a new job and earns $20 a day for walking a neighbor's dog. She adds this money to her banking account. After 8 days of walking the dog, she had $280 saved in her banking account. Write an equation in point-slope form to represent this situation. Then rewrite it in slope-intercept form to find out how much Sammi had in her banking account at the start.