How do you convert 0.40 into a fraction

First, write the number over 1
0.40/1
Continue multiplying the top and bottom by 10 until the decimal becomes a whole number
x 10
4/10
4/10 is a fraction, however it can be simplified - both numbers can be divided by 2
4/10 → 2/5

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for

Figure it out your self