A chemist has 50 grams of the isotope gold 196 which has a half life

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

can i see the following ?

step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).