Sketch the graphs of the following equations. For each graph, show the coordinates of the point(s) where the graph crosses the coordinate axes, and write down the coordinate of the turning point and the equation of the line of symmetry.

a. y = x² − 6x + 8 

b. y = x² + 2x − 15 

c. y = 25 − x² 

d. y = x² + 3x + 2

e y = −x² + 6x + 7 

f. y = 2x² + 4x + 10 

g. y = 2x² + 7x − 15 

h. y = 6x² − 19x + 10

i. y = 4 − 7x − 2x² 

j. y = 0.5x² + 0.2x + 0.02