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This is an equation of a line
We need to find 2 points to draw the line.
Find The y intercept and x intercept
if x is 0 y = 3
y=3 is the y intercept
if y is 0 x= -3/2
x=-3/2 is the x intercept
By joining the 2 points together you will find the line
y=x^2 + 3
This is an equation of a parabola.
Here a=1 b=0 c=3
a=1>0 the parabola opens upwards
The coordinates of the minimum point are
x=-b/2a = 0/2 =0
y(0)=0^2+3 y = 3
we need 2 more points to draw the parabola.
x=-1 y = 4
Join the tree points together and you see the parabola
This is the equation of a line that passes through the point O of the axis
We need 1 more point to draw the line
Join point O and this point (x=1 y=3) we have the line.