Astudent has 20 pencils at the beginning of the school year. after a week, the student has 18 pencils left. if the student continues to use pencils at the same rate, which equation will represent pencils left after w weeks?

p = -2w + 20

Step-by-step explanation:

If the student had 20 pencils but now has 18 pencils, he uses pencils at a rate of 2 per week.  So, m = -2  (negative because he is decreasing the amount of pencils).  The student started with 20 pencils so b = 20

Use the y = mx + b but replace "y" with "p" and replace "x" with "w" and input the m and b as stated above:

             p = -2w + 20

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Step-by-step explanation: