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**r-soy** Hi all

1 : True or False and why ? : Equation X = a defines a function with independent variable X ?

what does the graph of "x = a" look like? does it pass the vertical line test for a function?

2 : what the vertex of the parabola y= 1/2(x+3)^2 + 8 is ?

y = a(x-h)^2 + k has its vertex at (h,k)

3 - the graph of exponential function f(x) = b^x where b>0 and b dont = 1 will pass through :

a) - (0,0) b) - (1,1 ) c) - ( 0,1 ) d) - (0,1)

f(0) = b^0 = ?

I don't want the answer only also I need to explain the solving

thanks