I just need you to answer y=f(x)
here's what Desmos (graphing calculator) says https://www.desmos.com/calculator/fbtlvdxe00
here's what google says https://www.google.com/search?q=what+does+f%28x%29%3D-5%2B3x+equal&rlz=1CAJIKU_enUS916US916&oq=what+does+f%28x%29%3D-5&aqs=chrome.0.69i59j69i57j0.25621j0j7&sourceid=chrome&ie=UTF-8&safe=active&ssui=on