Answer:
y -15 = -3(x +2)
Step-by-step explanation:
The slope will be ...
m = (y2 -y1)/(x2 -x1)
m = (-18 -15)/(9 -(-2)) = -33/11 = -3
Point-slope form is ...
y -y1 = m(x -x1) . . . . . line with slope m through point (x1, y1)
Using the first point, the equation is ...
y -15 = -3(x +2)
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Find the negative reciprocal of the given line's slope in order to determine what the slope of the line will be.
-2/5 -> -5/2 -> 5/2
Your line now looks like this: y = 5/2x + b
Now, substitute the given point into the y and x variables and solve for b.
y = 5/2x + b
-3 = 5/2(2) + b
-3 = 5 + b
-8 = b
You are now done. The line is y = 5/2x - 8.
To find the unit price we need to all price divide by number of gallons, so
Answer: The unit price is $3.54
i think y= b^x because it is only the odd one from the group