Please need help on this one h as be no clue how to do this

y = -2x

Step-by-step explanation:

Find the slope and y-intercept to write an equation in the form y = mx + b

Slope = - 20/10 so -2, m = -2 since the line goes down to the right

Then it crosses the y-axis at (0,0) so b = 0 [which is the y value]

Put it all together y = -2x + 0 so y = -2x

constant of proportionality = 3 and the equation is c = 3p.

step-by-step explanation:

c = kp   where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.

substituting the values given:

24 = 8k

k = 3.

the same value of k will be obtained if we substitute the other given values.