Will mark brainliest! Please help

Determine the slope from the pair of coordinates (19,-2) and (-11,10)

1) 2/5
2)-5/2
3)-2/5
4)5/2

Also determine this slope for the pair of coordinates (12,-18) and (-15,-18)

1)undefined
2)12
3)1/12
4)0

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

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:

i dont understand

step-by-step explanation: