I need help with math, for my exam tomorrow

[main ferry]

For the quadratic part , just form 3 equations by the three pairs of (x,y) as shown in the graph.

For 5th , put y=0 since x intercept is to be fojnd

[willow rampart]

For level 7-8 ,1)
The y intercept of a quadratic equation will be the constant term. Here as it's (0,8) we can say c=8

Then you can plug in x values to get the respective y values for the points (-1,3) and (3,-1)

[willow rampart]

I hope this gives you an idea of how to do the last one

For the one right before it, the x intercepts are the roots of the equestrian so you can use the quadratic eq or split middle terms

Equation not equestrian