IKMC 2021 - Grades 11-12 - Set 2 - Self-study Question 10

Question 10

The parabola shown is $y=ax^2+bx+c$, where $a,b,c$ are distinct real numbers. Which equation could describe the shown straight line?

Question illustration

$y=bx+c$
$y=cx+b$
$y=ax+b$
$y=ax+c$
$y=cx+a$