How to graph y is less than or equal to - 0.7x+9

Simplify the expression, when adding or subtracting zero, the equation does not change - 0.7 X + 9 you remove the 0. but if you wanted to factor the expression you would have to convert the decimal number into a fraction zero - 7/10 X + 9 when adding or subtracting 0, the quality does not change - 7/10 X + 9 factor out of 1/10 form the expression 1/10 X (90-7X) or another way of writing it, 0.1 (90-7x)