1.Emily and Gabriel ran a race. They used a CBR to measure their distance over time. Which runner's distance-time relationship is quadratic? Explain your answer. Put all necessary calculations.

Time(s) 0 1 2 3 4 5

Emily's Distance (m) 0.00 0.75 3.00 6.75 12.00 18.75

Gabriel's Distance (m) 0.00 2.50 5.00 7.50 10.00 12.50

2.True or False. Explain your choice

a)If a parabola opens up and has zeros (-1,0) and (5, 0), then the vertex will be a maximum value.

b)All quadratic relations have two zeros

3.A Common Loon dives into Lake Huron to catch a fish. Its path into the water is modelled by the equation d=0.125t -5.25t+10, where d is the bird's depth in metres underwater and t is the time in seconds? How long was the bird underwater (Include diagram in the solution plz)

4.A diver dives off-platform. Her path to the water is modelled by the equation, h=-5(t-1)=20, where h is the diver's height above the water in feet after t seconds.

a)What is the maximum height reaches by the diver? (No solution needed, just answer)

b)When will the diver enter the water?