Answer:
Inflation chart or graph could be used to indicate a greater increase in monthly gas prices
Explanation:
Inflation is a quantitative measure of the rate at which the average price level of a basket of selected goods and services in an economy increases over some period of time.
Inflation chart is ususally used to inflation of a product which can be represented in terms of peecentage of inflation or inflation in product rate,
To indicate a greater increase in monthly gas prices, inflation chart can be used for gtaphical representation with month's name in X axis and the gas price in Y axis.