Is (4, 5) a solution to 2y – 3x = -7?

no

because when (4;5) is a solution to 2y - 3x = -7

=> 2y - 3x = -7 passes through (4;5)

but when x = 4; y = 5 => 2.5 - 3.4 = -2 (unreasonable)

=> (4;5) isnt a solution

Step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.