Question

For her ninth birthday, Isabella’s best friend, Jackson, gave her a full bag of M&M’s. Isabella determined she had 200 M&M’s in the bag. Since Isabella loves candy, she ate half of the M&M’s the first day. Her mom told her if she continues to eat the M&M’s at that rate, they would all be gone by tomorrow. Isabells decided she would only eat half of the candy each day and this would make it last forever!

whats the equation????

Answer 1

For this case, the first thing we must do is define variables.
 We have then:
 x: number of days
 y: total amount of M & M's
 We now write the equation that models the problem:
 $y = 100x - 200$
 Where,
 200: initial amount
 100: M & M's rate that Isabella eats per day.
 Answer:
 the equation is:
 $y = 100x - 200$

Answer 2

y=200-100x is the equation.