Aparabola with a vertex at (0,0) has a focus along the negative part of the x-axis.

which could be the equation of the parabola?

y2 = x
y2 = –2x
x2 = 4y
x2 = –6y

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled

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.

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step-by-step explanation: