You are building a go-cart for the National Go-cart Championship Race. Knowing that heavier go-carts travel faster but consume more gas, you need to figure out the optimal go-cart weight. This graph shows the relationship between the weights of last year's go-carts and the amount of gas they used. Use the graph to answer questions.

a. What overall conclusion can you draw from the data depicted in this graph?  

b. How much gas would a 40 kg go-cart use?

c. Predict how much gas a 100 kg go-cart would use. Show how you determined this.

d. You buy a tank that holds 200 ml of gas. What is the maximum weight your go-cart can consume exactly 200 ml of gas?

Gas Consumption Depending on Car Weight 400 350 300- 250 200- 150- 100- 50 80 100 120 140 160 Car weight (kg) 60 40 (u) posn se