Question

teddy is preparing to sell some wooden blocks at a garage sale. before pricing individual bags of blocks, he decides to determine the approximate number of blocks per pound by researching the weights of different sets of blocks. the graph shows his data. about how many blocks are there per pound? round to the nearest block. 10 20 30 40

Explanation:

Step1: Identify two points on the line

Let's take two points (1, 20) and (5, 100) from the line - graph.

Step2: Calculate the slope

The slope formula is $m=\frac{y_2 - y_1}{x_2 - x_1}$. Here, $x_1 = 1,y_1 = 20,x_2 = 5,y_2 = 100$. So $m=\frac{100 - 20}{5 - 1}=\frac{80}{4}=20$. The slope represents the number of blocks per pound.

Answer:

20