Uee two points on the line to find the slope.
(-1,2) and (1,-4)
Slope = change in y over change in x;
Slope = (-4 - 2)/ (1 - -1) = (-6/2) = -3/1 = -3
The y intercept is y value where the blue line crosses the y axis, which is at -1
The equation would be y = -3x-1
They could look at the weight(take into consideration if the book is paperback or hardcover), the length, and the size of the font to estimate the size of the book.
-9=x+10
-19=x
The answer is -19
total all the weights by the x's on the chart
total weight = 20 pounds
20/10 = 2
so you could put 2 pounds in each box.
Answer: 10 4/5
Convert the mixed numbers to improper fractions
Use the algebraic formula for addition of fractions:
a/b + c/d = (ad + bc) / bd
Reduce fractions and simplify if possible
