Can someone help me please

function is

Step-by-step explanation:

The general form for an exponential function is .   We need to find both k and b

(0, 3) is a point on the graph.  So, let's substitute 0 in for x and 3 in for y

Now we know that k = 3

(1, 18) is a point on the graph.  So, let's substitute 1 in for x, 18 in for y and 3 in for k

Now we know that b = 6

Therefore, the function is

That's not too bad, isn't it?

answer: 60

step-by-step explanation:

1/2a + (2/3×30)   = 50

1/2a + 20 = 50

1/2a = 30

a = 60

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed