The graph of the function passes through point a (-1.6 5). Find the value of k.

1) A function of the form y = kx + b is called a linear function. The letter factors k and b are called numerical factors. Any numbers (positive, negative or fractions) can be used instead of k and b.

2) From the condition we know that the graph of some function passes through the point a (-1.6; 5). Hence x = -1.6; y = 5.

3) Substitute these values into the equation: y = kx + b; 5 = -1.6k + b; 1.6k = b – 5; k = 5 / 8b – 3.125.

Answer: k = 5 / 8b – 3.125.