Question

how many more bricks does she need than pieces of straw?
more bricks
(bar chart with material on x - axis: straw, sticks, bricks, rocks; number needs on y - axis from 0 to 10. straw: 4, sticks: 8, bricks: 7, rocks: 6)

Explanation:

Step1: Find number of bricks

From the bar graph, the number of bricks needed is 7.

Step2: Find number of straw

From the bar graph, the number of straw needed is 4.

Step3: Calculate the difference

Subtract the number of straw from the number of bricks: $7 - 4 = 3$.

Answer:

3