They were produced inside stars.
 
        
                    
             
        
        
        
Answer:
analog-to-digital 
Explanation:
An analog-to-digital converter, or ADC as it is more commonly called, is a device that converts analog signals into digital signals.
 
        
             
        
        
        
Making cars that get better gas mileage
 
        
             
        
        
        
Answer:
scatter plots show the relationship between the independent and dependent variables 
Explanation:
A scatter plot is a graph which shows two variables plotted along two axes (usually the x and y axes). Scatter plots are useful in establishing any form of correlation between the dependent and independent variables in any study.
Correlation simply means the degree of relationship between variables, that is, how much does one variable affect the other? When scatter plots are almost a straight line graph, there is a high correlation between the variables. When the points in a scatter plot are isolated, there is little (sometimes zero) correlation between the variables.