This tactile graph shows y = 0.5x^3 - 3x^2 + 4.5x + 2, for x from -0.1 to 4.
Hold the plate with the raised triangle at the top-left.
A turning point is at x = 1, y = 4.
A turning point is at x = 3, y = 2.
The curve crosses the y-axis at y = 2.
Each marked point has a braille letter next to it: a, a turning point; b, a turning point; c, the y-intercept.
The braille number in the top-right corner, 3, is this graph's ID.
Note: automated checks measure spacing and size; they do not certify that a learner can understand the graphic.