EXAMPLE:
Draw
y = x2 + 3, using x-values
from –3 to 3.
Draw a table
y
= 02 + 3 = 0 + 3 = 3
y
= 12 + 3 = 1 + 3 = 4
y
= 22 + 3 = 4 + 3 = 7
y
= 32 + 3 = 9 + 3 = 12
Now be careful with the negative x-values
–plot each point
–join up all the
points with a smooth curve
–label the curve
with its equation
Lesson 25
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