Answer:
Step-by-step explanation:
The number of pencils at the beginning of the school year is 100. Since the pencils which she allowed the students to borrow is not usually returned. The rate at which she loses the pencils per month would constant. So the slope of the graph if number of pencils is plotted on the y axis and the months on the x axis,
The slope, m would be - 8 pencils per month because it is reducing
The equation for slope intercept form is expressed as
y = mx + c
Where
c = intercept
To determine c, we would substitute y = 100, x = 0 and m = 8 into the slope intercept equation. Ut becomes
100 = - 8×0 + c
c = 100
The equation becomes
y = - 8x + 100
