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: Find slope for rate

The rate of blocks per pound is the slope of the line. We can use two - points on the line, say (0.5, 10) and (4.5, 90). The slope formula is $m=\frac{y_2 - y_1}{x_2 - x_1}$.

Step2: Substitute points

Let $(x_1,y_1)=(0.5,10)$ and $(x_2,y_2)=(4.5,90)$. Then $m=\frac{90 - 10}{4.5 - 0.5}=\frac{80}{4}=20$.

Answer:

20