Mistakes Quad, Graphs, Logs, Mech, Trig, Stats Flashcards
Why can’t we take exact values from a cumulative frequency graph?
Because upper bounds are used.
How do we find the mean of two sets of data?
(First set n x mean) + Σx of second set / total n
How do you find out if two objects collide within a certain time?
Do a SUVAT equation and find s, if they add to total height they collide.
When doing logs and you get x = y(z)^a, what step do you take next, what do you not do?
x/y = z^a, do NOT make it yz^a.
When writing the min. VALUE for a quadratic graph which one do you choose from the min. point (x,y)?
y.
What should you always check when doing a graph equation?
You’ve put it in the form the question asked you to, in the right order too.
If the area of the sector is half of the area of the triangle what do you do to find r?
Half the area of the triangle and plug into A=1/2 r^2 theta.
What is the area of a triangle using theta?
A = 0.5(r^2)theta
What is the arc length equation?
s = r theta
What is the standard deviation equation?
root of sigma x^2 / n - mean^2 = standard deviation.
When square rooting something what do you make the power?
1/2.
