On a trip to the beach, Anh traveled 50 miles on the highway and 10 miles on a coastal access road. He drove three times as fast on the highway as on the coastal road. If Anh spent 30 minutes driving on the coastal road, how many minutes did his entire trip take? a-50 b-70 c-80 d- 90 e-100

Total time taken = 80 min

Step-by-step explanation:

Given:

Travel on highway = 50 miles

Travel on coastal road = 10 miles

Time spend on coastal road = 30 minutes

Find:

Total time taken

Computation:

Speed on coastal road = 10 / 30

Speed on highway road = 3[10 / 30]

Speed on highway road = 1 mi/m

Time taken on highway road = 50 / 1

Time taken on highway road = 50 min

Total time taken = 50 + 30

Total time taken = 80 min

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.