In 2000, the average cost for a gallon of gasoline was $1.40. in 2007, the average cost for a gallon of gasoline is $2.60. what is the percent of increase rounded to the nearest whole number?

The answer is 86% Hopefully this helps!

the function is a y-intercept

Step-by-step explanation:

y=mx+b is the slope intercept formula, m being the slope and b being the y-intercept, meaning y=b, so b=-9/4.

Because it says y=-9/4, we can assume that m, or the slope equals 0.

so when you plug it in, you get

y=0x-9/4

y=-9/4