A scientist wants to display the numbers of gallons of fuel that were used up in a one-hour period by three different types of motors. What type of visual
display should the scientist use?

Help please

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.