SOLUTION: I am having a hard time figuring out (a).. I have no idea how to set it up and solve- any help would be much appreciated!!!! In 2004, there were an estimated 39 million HIV in

Question 450936: I am having a hard time figuring out (a).. I have no idea how to set it up and solve- any help would be much appreciated!!!!

In 2004, there were an estimated 39 million HIV infections worldwide with an annual infection rate of 4.9 million.

a. Find the slope intersect form of a line that approximates the cumulative number of HIV infections in million during year X, where X ≥ 2004.
b. Estimate the number of HIV infections in 2010.
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
y=39*10^7+4.9*10^7x
If you want to graph it in millions:
y=4.9x+39

Solved by pluggable solver: DESCRIBE a linear EQUATION: slope, intercepts, etc

Equation describes a sloping line. For any
equation ax+by+c = 0, slope is .

X intercept is found by setting y to 0: ax+by=c becomes ax=c. that means that x = c/a. 39/-4.9 = -7.95918367346939.
Y intercept is found by setting x to 0: the equation becomes by=c, and therefore y = c/b. Y intercept is 39/1 = 39.
Slope is --4.9/1 = 4.9.
Equation in slope-intercept form: y=4.9*x+39.

RELATED QUESTIONS
I am having a hard time even trying to set this problem up, I am sure once i see how to... (answered by jim_thompson5910)

A person invests 600.00 at 5.64% compounded continously. How long will it take for the... (answered by scott8148,bucky)

I am having a hard time figuring out whether to add or subtract this system of equations... (answered by stanbon)

Hi I am trying to solve the following problem and having a hard time figuring it out. (answered by mananth)

I am having the most difficult time figuring out how to format this into a polynomial. I... (answered by josgarithmetic,Theo)

Jim has gotten scores of 60 and 100 on his first 2 tests. What score must he get on his... (answered by richwmiller)

I am having a hard time figuring this out and I cannot come up with any possible solution (answered by stanbon)

I have a problem 3x^0+(3x)^0. I am having a hard time figuring this problem out. Your... (answered by rapaljer)

I am having issues figuring this out because there is no symbol. Any help, and an... (answered by nnhs108)