1. Consider the quadratic function.
f(x)=-(x+4)(x-1)
(a) What are the x-intercepts and y-intercept?
(b) What is the equation of the axis of symmetry?
(c) What are the coordinates of the vertex?
(d) Graph the function on the coordinate plane. Include the axis of symmetry.
+37158 a) x intercepts occur when f(x) (which is 'y' ) = 0
-(x+4)(x-1) = 0 so x = -4 and 1 are the 'zeroes' (x intercepts)
y intercept is when x = 0 - (0+4)(0-1) = 4
b) axis of symmetry is exactly between the zeroes x = - 1.5
c) the x coordinate of the vertex is tha axis of symmetry x = - 1.5 use this value in the equation to calculate the 'y' coordinate
d ) graph it with your tools
