Janet’s gross salary is $2,400 per month. Her tax-free allowances are shown below: National Insurance ( 5% of gross salary)

Personal Allowances ( $3000 per year)

Calculate :

Her gross yearly salary

Her total tax-free allowances for the year

Her taxable yearly income.

A 10% tax is charged on the first $4000 and 15% on the remainder of taxable income. Calculate the amount of income tax Janet pays for the year.

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55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.