Graph y=-2x+5 please help fast

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Which strategy is used by public health to reduce the incidence of food poisoning?

Consider the input and output values for f(x) = 2x - 3 and g(x) = 2x + 7. what is a reasonable explanation for different rules with different input values producing the same sequence?