And don'tguess
find the x- and y-intercept of the line. -7/5x -4y = 7
a. x -intercept is -7/4; y-intercept is 5
b. x -intercept is 5; y-intercept is 7/4
c. x -intercept is 5; y-intercept is -7/4
d. x -intercept is -5; y-intercept is -7/4

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.

answer:

at time x=0 we have 1000, at time x=1 we have 2000, at time x=2 we have 4000.  

so that's an initial value of 1000 and a ratio of 2,

y = 1000 (2^x)

hope this !