Answer:
To build and sketch 4y - 3 using algebra tiles, you would need four yellow tiles (representing 4y) and three red tiles (representing -3). Arrange the four yellow tiles in a horizontal row, and then place the three red tiles directly below them. The final result should look like a rectangle that is four tiles wide and three tiles tall.
The area of this rectangle represents the expression 4y - 3. The horizontal side (4 tiles) represents the coefficient of y, and the vertical side (3 tiles) represents the constant term.