Question

In which direction does the parabola open?

y = 3x2 – 5x – 10


down
up
left
right

Answer 1

the \(x\) is squared and the leading coefficient is positive (it is 3) so it opens the same way as \(y=x^2\)

Answer 2

Reminder: y = ax^2 + bx + c
When a is positive, the parabola is upward. Here a = 3 is positive
When a is negative, the parabola is downward.