Answer the following either true or false and justify your answer. Give an example if the statement is false and provide an explaination if true:

1) The graph of y=-4x^2+8 is obtained from the graph of x^2 by applying a vertical stretch, a reflection and a horizontal shift.

2.) If f(x)>0 for all x and g(x) is a vertical stretch of f(x) and g(x)>f(x), for all x

3.) Every linear function has a y-intercept

4.) The line through the points (1, -3) and (-2, 6) is perpindicular to the line with equation 6y-2x=0

Can anyone help me with these four questions..><.thank you