O GRAPHS AND FUNCTIONS E Mary v Writing and evaluating a function.. Espanol Rachel is a software saleswoman. Her base salary is $ 1800, and she makes an additional $70 for every copy of Math is she sells. Let P represent her total pay (in dollars), and let /V represent the number of copies of Math is Fun she sells. Write an equation relating P to N. Then use this equation to find her total pay if she sells 28 copies of Math is Fun. Equation: 0=0 Total pay if Rachel sells 28 copies: $ X D Aa V