Use X to represent squares and Y to represent triangles. Write the equation shown on the hanger

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)