How to use slope intercept form

If you used 3/4 of the blue paint to make flames on one of the cars, and need 7 3/4 pints of blue paint to paint another car, what amount of blue paint do you need to buy?

The daily lowest temperature, in degrees Fahrenheit, for a certain week are - 2, - 3, x, 2x, 4, 8. For the week, the sum of the temperatures was - 7°F. What is the value of x?

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A netball court is 30m by 15m. What is the distance from one corner of the court to the other

Jose bought a pair of sneakers, a gaming headset and a T-shirt for $77. The headset cost two times as much as the T-shirt and the pair of sneakers cost $25 more than the T-shirt. 1.

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.