Which among the equations below define functions? explain. a. y = 5x – 4b. 3x – 2y = 2c. y = x^2d. x^2+ y^2 = 9e. y^3 = x

FUNCTION  When a function G is defined by y= f(x), then x is called the independent variable. Any element of the domain can be chosen as a value of the independent variable. The resulting value determines the corresponding value of the dependent variable. read the details about function in

•The value of the dependent variable y= f(x) that correspondents to a specific value of an independent variable x is found by substituting x into the function rule, then, simplifying the resulting expression. Such process is called evaluating a function. Read the details about function in

Read the details about function in

a. y = 5x – 4b.  because  it passed in vertical line test. it is one point only that intersect in in horizontal line test. To determine whether it is function  by using the vertical line test. If the graph passed to Vertical line test it is consider as function. The graph of function defines y as a function of x if no vertical line intersects the graph in more than one point.

•Given a relation in x and y, we say y is a function of x if for each element x in the domain, there is exactly one value of y in the range.  It is a rule of correspondence between two nonempty sets, such that, to each element of the first is called domain, there correspondents one and only one element of the second is called range. Read the details about function notation in

M= { 9, 11, 13, 15, 17, 19, 21, }
a = { 7 }
t = {  caloocan,  las piñas, makati, malabon, mandaluyong, manila, marikina, muntinlupa, navotas, parañaque, pasay, pasig, quezon city, san juan, taguig, valenzuela }
h = { 8, 9 }

s = { 4  } ~ not sure but 4 is a day in a month with four letters when spelled.
or
s = { friday } ~ if base on the calendar, friday is the 6th day of the week with six letters when spelled.

Circle 1
a=2
r=0.80

circle 2
a=18
r=2.39

2nd circle is "9" times of the first.