Can someone help me with this??

Step-by-step explanation:

m = 1/2

Point = (1,4)

General formula

y = mx + b

y = 1/2 x + b

x = 1

y = 4

4 = 1/2 (1) + b

4 = 1/2 + b              Subtract 1/2 from both sides

4 - 1/2 = b

b = 3.4

y = 1/2 x + 3.5

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:

a

step-by-step explanation: