Select all the lines that represent functions

B, C, D are functions

Step-by-step explanation:

Functions are those that do not share an x value.  Look at A.  x-values are used twice everywhere except the vertex.  This is not a function, it is just a relation.  B does not at any time share x-values, so this is a function.  C is also a function, and so is D.  F is a vertical line that shares the same x value throughout the whole line, so this is definitely not a function.

c

step-by-step explanation:

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)