The function C(x)=72*(1.04)^x, models the cost in dollars, C, of 1 ounce of a certain chemical used in a laboratory, and X represents the number of years since 2010. 1. Does the cost of the chemical increase or decrease overtime, and by what percentage per year does it do so?

The cost increases by 4% per year

The cost decreases by 4% per year

The cost increases by 6% per year

The cost decreases by 6% per year

11

step-by-step explanation:

32.50-7.50=25

225/25=11

one way is to plot 2 points and connect them which is what the answer choices seem to be doing

it seems to be using the y intercept and the slope

y=mx+b, m=slope, b=y-intercept (where the line hits the y axis)

slope=rise/run

y-intercept is where the line croses the y axis which is the y value where x=0

you seem to have given the wrong slope (you didn't put a number in front of te x, it should be 2/3 or 3/2 looking at the answer options)

y=? x-1

m=? because of your fault

b=-1

so it has a slope of ? and y intercept of -1, meaning it pases through (0,-1)

so draw point (0,-1) (so answer is one of the first 2 option)

if slope is 2/3, then go up 2 and right 3 then draw line through those 2 points

if slope is 3/2, then go up 3 and right 2 then draw line through those 2 points