Three points of a function are graphed. which statement describes the function through the points? the function is a direct variation function with a constant of variation of 1.5. the function is a direct variation function with a constant of variation of 1.8. the function is linear but is not a direct variation function. the function is not a linear function.

Given that you have not included the graph, i am going to explain you how you can determine the validity of each statement: 1) the function is a direct variation function with a constant variation of 1.5- direct variation impliesthat the graph is a straight line that passes through origin, so you should check this condition first.- constant variation of 1.5 means that the slope is 1.5 and that y = 1.5 x.  so you must check that the ratio for they y and x coordinates is 1.5 for all the three points.if the two contidions are met, the statement is true, else the statement is false.2) the function is a diret variation function with a constant variation of 1.8.again this means that the graph is a straight line that passes through the origin (0,0) and that the ratio of the y and x coordintates of each point is 1.8.so, if the three points meet those conditions the statement is true, else the statement is false.3) the function is linear is not a direct variaton: if the graph is straight line that does not pass through the origin, the function is not a direct variation.that is equivalent to say that ratio of the y and x coordinates is not constant.with that you can check whetther this statement is true or false.4) the funcion is not a linear function.that means that the graph is not a straight line.