For all functions of the form f(x) = ax2 + bx + c, which is true when b = 0?
the graph will always have zero x-intercepts.
the function will always have a minimum.
the y-intercept will always be the vertex.
the axis of symmetry will always be positive.

The correct answer is:

The y-intercept will always be the vertex.

Explanation:

The vertex is found by first finding the axis of symmetry, using the formula

x = -b/2a

If b = 0, this gives us

x = 0/2a = 0

This means the point (0, c) will be the vertex.  This is also the y-intercept.

c

Step-by-step explanation:

i just took the test on e2020

y=mx+b

step-by-step explanation:

m is slope, b is y-intercept

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

happy to

pls mark as brainliest