To solve this problem you can do a proportion

to find 'x', we have to cross multiply the numbers.

and

this will get you

to get 'x', we have to divide by 100 on each side

your answer will be

so, Chris must raise 75.25 dollars by himself
I dont understand the question
This is the standard for of seven hundred (700) thirty (30) one (1) :
Answer: 731
We know
in the graph two points
point 1 (2,1) and point 2 (-1,-4)
the equation in point-slope form is ----------------> (y-y1)=m(x-x1)
step 1
find the value of m
m=(y2-y1)/(x2-x1)----------> (-4-1)/(-1-2)--------> m=5/3
step 2
with the point (-1,-4) and m=5/3
find the equation in point-slope form
(y-(-4))=(5/3)*(x-(-1))-------------> (y+4)=(5/3)(x+1)
the answer is the option d) ( y+ 4 ) =+ 5/3 ( x + 1 )