 Pinexam——There is royal road to learning.

## What is the inequality that corresponds to the graph (A) y > 3x + 2

(B) y ≤ 3x + 2

(C) y ≥ 3x + 2

(D) y < 3x + 2

(E) y < 3x + 2

Explanation

If the solutions to the equation (x + a)(x + b) = 0 are x = 8 and x = - , then a + b = ?

（A）-13 （B） -12 （C） -6.5 （D） 6.5 （E） 12

Katie notices that the textbooks for her past 3 math courses have the same length and width, but each year's textbook has more pages and weighs more than the previous year's textbook. Katie weighs the textbooks, to the nearest 0.1 ounce, for her past 3 math courses and wonders about the relationship between the number of pages in math textbooks and the weights of those textbooks. She graphs the number of pages and corresponding weights of her 3 math textbooks in the standard (x,y) coordinate plane, as shown below, and discovers a linear relationship among these 3 points. She concludes that the equation of the line that passes through these 3 points is y = 0.1x + 2.2. How much more, in ounces, does a math textbook with 1,056 pages weigh than one with 868 pages?