2 In 1856, Andrew Waugh announced Mount Everest to be 8840 m high, after several
years of calculations based on observations
made by the Great Trigonometric Survey
More recent surveys confirm the height as
8848 m. Calculate the percentage error made
in the earlier survey.

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

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

i hope this is what you were looking for.

see attached graph