Answer:
The answer to your question is j(4) = 1
Step-by-step explanation:
Data
j(x) = -3/4 x + 3
Process
To solve this problem just substitute x by 4 and simplify using arithmetics.
1.- Just substitute x by 4
j(4) = -3/4 (4) + 3
2.- Multiply -3 by 4
j(4) = -12/4 + 4
3.- Simplify
j(4) = -3 + 4
4.- Subtract -3 from 4
j(4) = 1
