Answer:
A straight line on a graph indicates that there is a DIRECT or LINEAR relationship between the dependent variable and the independent variable
Step-by-step explanation:
As we know that the equation of straight line is given as

here we know that
y = dependent variable
x = independent variable
So here we know that independent variable when directly depends on independent variable then the relation between them is plotted on the graph must be a straight line graph
so correct answer will be
A straight line on a graph indicates that there is a DIRECT or LINEAR relationship between the dependent variable and the independent variable