1.3 Can do.  Review

 1. The x- axis has equation x = 0.
(a) TRUE;  (b) FALSE		 (a); (b)
                                      		    
(b) This is the equation of the y-axis.
 2. The straight line f(x) = 2x + 3 cuts the x- axis at the point with coordinate 3.
(a) TRUE;  (b) FALSE		 (a); (b)
(b) The y-intercept is 3.
 3.
 The parabola defined by f(x) = x2 + 2x cuts the x- axis in two distinct points.
(a) TRUE;  (b) FALSE		 (a); (b)
(a) The equation has zeroes 0 and –2.
 4. The parabola defined by f(x) = x2 + 2x + 1 cuts the x- axis in
(a) 0;  (b) 1;  (c) 2 points ?		 (a); (b); (c)
(c) This parabola touches the x-axis at x = –1.
 5. The graph of   f(x) = sin x is the same as the graph of f(x) = cos x, but translated to the right.
(a) TRUE;   (b) FALSE		 (a); (b)
(a) You might be able to construct an identity from this property.
 6. A circle can result as the graph of some function.
(a) TRUE;  (b) FALSE
                                                                            		 (a); (b)
(b) Vertical lines which intercept the circle meet it in 2 points; this cannot happen for a function.

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