Answer:
27th Street is x = -2
L Street is y = 1
Franklin is y = -(2/2.5)x - 4.2
Explanation:
See the attached map. I only found Franklin Avenue after the main map was completed, so added it as best I could at the bottom. The scale isn't quite correct, but perhaps close enough.
Using the two given locations, (-4,0) and (4,0), axes were drawn and labelled according to the information provided.
The equation of 27th Street is x = -2, a vertical line. The equation for L Street is y = 1, a horizonal line.
The equation for Franklin Avenue is, best guess, a line with a negative slope. Take two points on that line and develop the equation for the line.
(-4,-1) and (-1.5,-3)
Slope is Rise/Run
Rise = (-3 - (-1)) = -2
Run = (-1.5 - (-4)) = 2.5
The slope is -(2/2.5).
The line has the form y = -(2/2.5)x+b
To find b, enter one of the two given points:
y = -(2/2.5)x+b
-1 = -(2/2.5)(-4)+b for point (-4,-1)
-1 = (3.2) + b
b = - 4.2
The [approximate] equation for Franklin Avenue is y = -(2/2.5)x - 4.2