Question

Keisha is reading a 325 page book at a rate of 25 pages a day.use a point slope equation to determine whether she will finish reading the book in10 days?

Answer 1

You can easily tell if Keisha will finish reading the book by this equation:

y = 325 - 25x
where y is the number of pages left, and x is the number of days. A point slope for has a standard form of y - y1 = m(x - x1). Thus, we arrange it in this manner:

y = 25(13 - x)

Then, substitute x = 10:

y = 25(13 - 10)
y = 75

So, Keisha will not be able to finish the book in 10 days. There are still 75 pages left to read.