What is the system of equation for 2x+y=3 and x=2y-1

If the line in the graph is shifted up two units which is the equation of the new line

The graph shows the amount of total rainfall at each hour what was the total rainfall amount after three hours

When you dilate a figure with a scale factor of 1/2, what will the dilated figure look like?                                                                                           a: the dilated figure will have side lengths that are half the length of the original side lengths.                                                                          b: the angles in the dilated figure will be half the measure of the original figure.                                                                                c: the dilated figure will have side lengths twice the length of the original.