Which point on the graph represents the y-intercept?

I answered this before. 

A = 12x^{2} +55x+50

Step-by-step explanation:

b = 3x+10

h = 4x+5

A = bh

A = (3x+10)(4x+5)

A = 12x^{2} +15x+40x+50

A = 12x^{2} +55x+50

It is a second degree equation, since the major exponent is 2. In the multiplication of polynomials, it is necessary to consider their exponents, because these are added by passing the same variable, and they must always be integers