Which equation represents a direct variation? What is the constant of variation?
3y = 2x+1;1
y=-5x-11;5
4y=-12x; -3
y+7=2x-1;7

C

Step-by-step explanation:

The equation of quantities in direct variation is

y = kx ← k is the constant of variation

The only equation in this form is 4y = - 12x, that is

4y = - 12x ( divide both sides by 4 )

y = - 3x ← in form representing direct variation with k = - 3 → C

26

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

click to let others know, how is it

0.0

0 votes

1

report

read more on -

step-by-step explanation: