1. **State the problem:** Lerato's indoor plant grew over 7 weeks, and each shaded block on the chart equals 5 mm of growth. We need to find the plant's total growth in centimetres. 2. **Calculate the total growth in millimetres:** Count the shaded blocks for each week and multiply by 5 mm per block. Week 1: 2 blocks $\times 5 = 10$ mm Week 2: 3 blocks $\times 5 = 15$ mm Week 3: 5 blocks $\times 5 = 25$ mm Week 4: 5 blocks $\times 5 = 25$ mm Week 5: 5 blocks $\times 5 = 25$ mm Week 6: 5 blocks $\times 5 = 25$ mm Week 7: 4 blocks $\times 5 = 20$ mm 3. **Sum the total growth in millimetres:** Total growth $= 10 + 15 + 25 + 25 + 25 + 25 + 20$ Calculate the sum: $$ 10 + 15 = 25 $$ $$ 25 + 25 = 50 $$ $$ 50 + 25 = 75 $$ $$ 75 + 25 = 100 $$ $$ 100 + 20 = 120 $$ So, total growth $= 120$ mm 4. **Convert millimetres to centimetres:** 1 cm $= 10$ mm, so: $$ 120 \text{ mm} = \frac{120}{10} = 12 \text{ cm} $$ **Final answer:** The plant grew a total of **12 centimetres** over 7 weeks.