Iborrow £50 off my mum £50 off my dad and buy a jumper for £97. £3 is left so i give £1 to my mum £1 to my dad and i kept £1 which i now owe £49 to my mum and dad so how comes that only adds up to £99

Step-by-step explanation:

first we used the $3 in change to inaccurately subtract $1 from what you owe each of your parents ($50 - $1 = $49) (you're counting backwards!),

and then added to that total debt balance of  $98 ($49 I owe mom + $49 I owe dad) the $1 which you kept for yourself to then arrive at the false sum of $99

we should have correctly and consistently added the $3 change back onto the $97-cost of the shirt so that the correct total balance of $100 would then be realized and accounted for as follows:

BEFORE THE PURCHASE OF THE SHIRT

Amount borrowed from mom -- $50

Amount borrowed from dad   --  $50

Total borrowed                          --  $100

AFTER THE PURCHASE OF THE SHIRT

Cost of shirt                              --     $ 97

plus $ 3 change:

One dollar to mom                  --     $   1

One dollar to dad                     --     $   1

One dollar for myself              --      $  1

Total                                         ---     $100

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is