Is an equation with an integer coefficient will always have an integer solution true or false?

An equation with an integer coefficient will always have an integer solution. Integers are whole numbers ( positive and negative and zero ). One example of equation:
4 x = 5  ( 4 is an integer coefficient )
x = 5 : 4 = 1.25 ( not an integer )

This is false.

Yes, the car is traveling at a constant speed. You can tell because the graph is moving upwards to the right at a constant rate. The car is traveling at a speed of 60 miles per hour.