Which system of linear equations has no solution? y = 3x – 8 and y=1/2x - 3
y= 2x and y = 2x – 6
y= 1/5x + 1 and 5y – x = 5
y= 4x + 2 and 4x = y - 2

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0