Linear function given by the formula y = -4x + 7. Find the y-value if x = -1.3: 8.

To find the value of the expression y = -4 * x + 7, you need to substitute the number given to us instead of x and find the value of the resulting expression. Since we have two numbers, there will be two examples.

1) y = -4 * (-1.3) + 7;

y = 5.2 + 7;

y = 12.2.

2) y = -4 * 8 + 7;

y = -32 + 7;

y = -25.

Answer: 12.2; -25.