Weight height 99 61 104 61 110 62 133 64 130 65 142 68 146 66 153 67 184 69 185 70use your calculator to find the equation of the regression line.  write the equation in y=ax+b  form.  do not use any spaces. round  a  and  b  to the nearest tenth. 

Use the graphing calculator to plot the line y=ax+b for the given data. On the attached diagram you can see green points that are ordered pairs weight-height and black line is regression line.

As you can see a≈0.1 and b≈50.9.

The equation of regression line is y=0.1x+50.9.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute: