This week in math, we did review of everything before spring break, and started learning about how to graph quadratic formulas. 

Depending on the given function, we can determine many things, such as opening, vertex, domain and range.

For example:

f(x) = -2(x + 4)^2 – 1

Because this number is a negative, the parabola opening will be downwards.

The number with the x in brackets is always the x-intercept, but opposite symbol. So this one, would be -4. The number after brackets will always be the y-intercept, not opposite. So this one, would be -1.

V = (-4, -1)

The domain is always XER

Range = y < -1

My biggest mistake this week was always forgetting to switch the symbol of the x-intercept, which always lead me to having the wrong function.