Which of the following equations represents a linear function? a) y= x2+2x+3
c) y=+2
b) y=$+5
d) y= x3+7

answer: it's a

step-by-step explanation:

4

step-by-step explanation:

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)