Question

SOMEBODY PLZ HELP NUMBER 2

Answer 1

1) using a graphic tool

see attached figure n1

 ph=0-----> for t=0.1

ph=1-------- > for t=0.01

 2) using a graphic tool

see attached figure n2

 for t=0.5------------------ > ph=-0.699

 p(t) = −log10t------------------ > y= −log10t

convert the logarithmic function into an exponential function 

we have   10^y = 10^(-log(t))   ------------ > 10^(y) = 1/t ---------- > t = 10^(-y)

t = 10^(-y) 

3)                 p(t) = −log10t 

 which transformation results in a y-intercept (t=0)

 case
a) p(t) + 1
p(t) = −log10t +1

Still here you can not have a Y intercept (t can't =0) since you would still have log(0) which is forbidden

b) p(t + 1)
p(t) = −log10(t+1)
Here of course t can be zero since that just gives you log(1). So you have a Y-intercept. 

using a graphic tool

see attached figure n3b

for t=0------------------------ph=-0.9

 c)  −1 • p(t)

p(t) = log10t 

 Still here you can not have a Y intercept (t can't =0) since you would still have log(0) which is forbidden