Answer :
You just replace x to -3/4;
f(-3/4) = 4 (-3/4) + 1
4 cancels another 4 in denominator
= -3 + 1
= -2
So you have f(-3/4) = -2
f(-3/4) = 4 (-3/4) + 1
4 cancels another 4 in denominator
= -3 + 1
= -2
So you have f(-3/4) = -2