non calculator

Question 1

y is proportional to x

Answer 1

y ∝ x

y= kx

Question 2

y is inversely proportional to x

Answer 2

y ∝ 1/x

y = k/x

Question 3

y is proportional to the square of x

Answer 3

y ∝ x²

y = kx²

Question 4

when to use the quadratic equation

Answer 4

ax² + bx + c = 0

Question 5

quadratic inequalities rules

Answer 5

if x² > a² then x > a or x < -a

if x² < a² then -a < x < a

Question 6

fractional powers

Answer 6

the power 1/2 = square root
the power 1/3 = cube root
the power 1/4 = fourth root etc

Question 7

y is inversely proportional to the square root of x

Answer 7

y ∝ 1/square root x

y = k/square root x