Gregory saw that the answer to a problem in his friend’s textbook was 4+2i. this is an example of which type of number? an integer a rational number a complex number an irrational number

For this case the first thing you should know is that a complex number is written as follows:
 a + bi
 Where,
 a: real part
 bi: imaginary part
 We note that for this case:
 a = 4
 b = 2
 Obtaining the following complex number:
 4 + 2i
 
 This is an example of:
 a complex number

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for