What does the value of h control?
what does the value of k control?
what does the value of a control?
if h = 0 and k = 0, which way does the graph open when a > 0 (positive)?
if h = 0 and k = 0, which way does the graph open when a < 0 (negative)?
if h = 1 and k = 2, what are the coordinates of the blue point?
if h = -3 and k = -2, what are the coordinates of the blue point?

y=mx+b

step-by-step explanation:

m is slope, b is y-intercept

yes

yes yes yes

at least two

step-by-step explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15