How do you classify the different biological zones in rivers and streams:
lengthwise:
width wise
vertically

answer: y

=

x

−

5

to find the x-intercept, substitute in  

0

for  

y

and solve for  

x

.

0

=

x

−

5

solve the equation.

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x

=

5

to find the y-intercept, substitute in  

0

for  

x

and solve for  

y

.

y

=

(

0

)

−

5