x' a? ...II 93%| F The Quadratic Functions: l 6. a) Describe in words the transformations relative to the graph of for) = x "2. t (Vertical stretch/compression; vertical shi; horizontal shift; reected in the x-airis. y=-4(x+7)=+2 V(,) l l l b) Write the poordinates of the vertex J c) Sketch the graph l 7. Find the zeros of each quadratic relation ( Use factoring or the Quadratic formula) 21) y=x'-6x-7 1 b) y=2x=-28x~+98 | r l i 8) A football was kicked. Its path can be modelled by the relation h = - 0.2( t 5.3)2 + .8 where h is the height of the ball above the ground, in metres, and t is the time, in seconds. a) What is the vertex of the parabola? b) What is the football initial height?\\ 0) Sketch a graph d) When does the ball hit the ground