How do you find #f(3/4)# given #f(x)=-1+1/4x#?

2 Answers
Aug 18, 2016

When you insert 0.75 in the function, the answer will be -0.8125

Explanation:

You will solve it easily by putting 0.75=3/4 into function equation.

Now you will have -1+(3/16)= -13/16 = -0.8125

Aug 18, 2016

I would prefer to retain fractions as the expression is given in fractions.

Explanation:

Given
#f(x)=-1+1/4x#
To find #f(3/4)#, insert value of #x# in both sides of the equation. We obtain
#f(3/4)=-1+1/4xx3/4#
#=>f(3/4)=-1+3/16#
Simplifying RHS we obtain
#f(3/4)=(-16+3)/16#
#f(3/4)=-13/16#