The product of two consecutive integers is 420 which quadratic equation can be used to find x the lesser number

Step-by-step explanation:

If the smallest number is 'x', then the other number = x +1

x*(x+1)= 420

Use distributive property

x*x + x*1 = 420

x² + x - 420 =0   > this is the required quadratic equation.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

c

step-by-step explanation:

it would be see because your formula is f(x)=6x, so 6 times 1 is 6 and you go on and the best answer is c.